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Ordering number : ENA0366
Monolithic Digital IC
LB8503V
Overview
DC Fan Motor Speed Control IC
The LB8503V is an improved functionality version of the LB8500 and LB8502 products that features the added functions listed below. The LB8503V supports both single-phase and three-phase applications.
Added Functions
* Supports origin shifting in the speed control function * Adds a dedicated pin for setting the soft start time This allows a longer start time to be set without reducing the response time when changing speed. * FG output pin added
Functions and Features
* Achieves linear speed control Applications can set the slope of the change in motor speed with change in the input duty. * Minimized speed fluctuations in the presence of line or load variations * Allows a minimum speed to be set * Soft start function * Settings using external capacitors and resistors (to support easier mass production of end products) * Supports both PWM duty and analog voltage control inputs
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment.
31407 TI PC 20060207-S00003 No.A0366-1/20
LB8503V
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Supply voltage Output current FG output pin output voltage FG output pin output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max IO max VFG max IFG max Pd max Topr Tstg VCC pin E0 pin FGOUT pin FGOUT pin When mounted on a circuit board *1 Conditions Ratings 18 3 18 10 0.8 -30 to +95 -55 to +150 Unit V mA V mA W C C
*1 Specified circuit board : 114.3 x 76.1 x 1.6mm3, glass epoxy.
Allowable Operating Range at Ta = 25C
Parameter Supply voltage range 1 Supply voltage range 2 Output current 6V constant voltage output current CTL pin voltage LIM pin voltage VC1 pin voltage VCTL VLIM VCI 0 to 6VREG 0 to 6VREG 0 to 6VREG V V V Symbol VCC1 VCC2 IO IREG VCC pin VCC pin, with VCC shorted to 6VREG E0 pin Conditions Ratings 7.5 to 17 5.5 to 6.5 2.5 -5 Unit V V mA mA
Electrical Characteristics at Ta = 25C, VCC = 12V
Parameter Supply current 6V constant voltage output (VREG pin) Output voltage Line regulation Load regulation Temperature coefficient Integrating Amplifier Block (E01) Common-mode input voltage range High-level output voltage Low-level output voltage Integrating Amplifier Block (E03) High-level output voltage Low-level output voltage FGIN pin High-level input voltage Low-level input voltage Input open voltage Hysteresis High-level input current Low-level input current FGOUT pin Output low saturation voltage Output leakage current VFG IFGL 0.2 0.3 10 V A VFGH VFGL VFGO VFGS IFGH IFGL VFGIN = 6VREG VFGIN = 0V 3.0 0 VREG - 0.5 0.2 -10 -140 0.3 0 -110 VREG 1.5 VREG 0.4 10 V V V V A A VOH(E03) VOL(E03) IEO1 = -0.2mA IEO1 = 0.2mA VREG - 1.2 VREG - 0.8 0.8 1.0 V V VOH(E01) VOL(E01) IEO1 = -0.2mA IEO1 = 0.2mA VREG - 1.2 VREG - 0.8 0.8 1.0 V V VICM 2.0 VREG V VREG VREG1 VREG2 VREG3 VCC = 8 to 17V IO = -5 to 5mA Design target* 5.8 6.0 40 10 0 6.2 100 100 V mV mV mV/C Symbol ICC Conditions min Ratings typ 5.5 max 6.5 mA Unit
Continued on next page.
No.A0366-2/20
LB8503V
Continued from preceding page. Parameter RC pin High-level output voltage Low-level output voltage Clamp voltage CTL pin High-level input voltage Low-level input voltage Input open voltage High-level input current Low-level input current C pin High-level input voltage Low-level input voltage LIM pin Input bias current Common-mode input voltage range SOFT pin Charge current Operation voltage range VCI pin Input bias current Common-mode input voltage range VCO pin High-level output voltage Low-level output voltage VOH(VCO) VOL(VCO) VREG - 0.2 2.0 V V IB(VCI) VIVCI -1 2.0 1 VREG A V IC(SOFT) VISOFT 2.0 1.4 VREG A V IB(LIM) VILIM -1 2.0 1 VREG A V VOH(C) VOL(C) VREG - 0.3 1.8 VREG - 0.1 2.0 2.2 V V VCTH VCTL VCTO ICTH ICTL VFGIN = 6VREG VFGIN = 0V 2.0 0 VREG - 0.5 -10 -140 0 -110 VREG 1.0 VREG 10 V V V A A VOH(RC) VOL(RC) VCLP(RC) 3.2 0.8 1.5 3.45 0.95 1.65 3.7 1.05 1.8 V V V Symbol Conditions min Ratings typ max Unit
* The design specification items are design guarantees and are not measured.
Package Dimensions
unit : mm (typ) 3178B
1.0
Pd max - Ta
Specified circuit board : 114.3x76.2x1.6mm3 glass epoxy board
5.2 16 9
Allowable power dissipation, Pd max - W
0.8
0.6
4.4
6.4
0.5
0.4
1 0.65 (0.33)
8 0.15 0.22
1.5max
0.2
0 - 20
0
20
40
60
80
100
Ambient temperature, Ta - C
SANYO : SSOP16(225mil)
0.1 (1.3)
No.A0366-3/20
LB8503V
Pin Assignment
EO3 16 EO1 15 EI 14 NC 13 GND 12 FGOUT 11 FGIN 10 LIM 9
LB8503V
1 RC
2 SOFT
3 VREG
4 VCC
5 CVI
6 CVO
7 CTL
8 C Top view
Pin Functions
Pin No. RC SOFT VREG VCC CVI CVO CTL C LIM FGIN FGOUT GND NC EI EO1 EO3 Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Description One-shot multivibrator pulse width setting. Connect a resistor between this pin and VREG, and a capacitor between this pin and ground. Soft start time setting. Connect a capacitor between this pin and VREG. 6V regulator output. Connect a capacitor between this pin and ground for stabilization. Power supply. Connect a capacitor between this pin and ground for stabilization. Control voltage input Duty pulse signal smoothed voltage output Duty pulse signal input. The speed is controlled by the duty of this pulse signal. Duty pulse signal smoothing. Connect a capacitor between this pin and VREG. Minimum speed setting. Normally, the 6V regulator level is resistor divided to set this pin's input level. FG pulse input FG pulse output Grand pin NC pin One-shot multivibrator output and integrating amplifier input. A capacitor must be connected between this pin and EO for this integration. Integrating amplifier output. (For use with an accelerating driver IC if the command voltage becomes low (single-phase systems).) Integrating amplifier inverting output. (For use with an accelerating driver IC if the command voltage becomes high (three-phase systems).)
No.A0366-4/20
LB8503V
Block Diagrams and Application Examples
Combination with an accelerating driver IC when the command voltage goes low (single-phase systems)
LB8503V
12V C4 VCC VREG FGOUT VREG 6VREG
C5 R3
EDGE
FG FGIN
FG
C3 R1 C6 R2
RC
One-shot multivibrator
EI LIM C2 VTH VREF SOFT CVI R4 R5 EO3 C CVO VREG EO1
C1
CTL signal
CTL
CTL GND
I LB01769
No.A0366-5/20
LB8503V
Combination with an accelerating driver IC when the command voltage goes high (three-phase systems)
LB8503V
12V C4 VCC VREG FGOUT VREG 6VREG C5 R3
EDGE
FG
FGIN
FG
C3 R1 C6 R2
RC
One-shot multivibrator
EI LIM EO1 C2 VREF
C1
R4 R5
SOFT CVI CVO
VREG VCTL EO3 C
CTL signal
CTL
CTL GND
I LB01770
No.A0366-6/20
LB8503V
Speed Control Diagrams
The slope is determined by the external constant connected to the RC pin. (RPM) For a smaller RC time constant For a larger RC time constant
Speed
Minimum speed
Determined by the LIM pin voltage
0%
Low CTL pin (PWM DUTY) High EO1 pin voltage (V) Low EO3 pin voltage (V) Set minimum speed
High Low High
100%
Variable speed
Full speed High on duty
Low on duty CTL pin
6VREG LIM voltage EO pin EO1 voltage 0V
Startup Timing (soft start)
VCC pin
CTL pin
Stop
SOFT pin
Full speed Soft start The slope can be changed with the capacitor connected to the C pin (A larger capacitor increases the slope.) Full speed
Stop
No.A0366-7/20
LB8503V
Supplementary Operational Descriptions The LB8503V accepts a duty pulse input and an FG signal from the driver IC, and generates the driver IC control voltage so that the FG period (motor speed) becomes proportional to the control voltage.
LB8503V
Driver IC
FGIN CTL signal CTL Closed feedback loop
FG
EO
VTH
As shown in the figure below, the LB8503V generates a pulse signal from edges on the FG signal and then generates a pulse width waveform determined by the RC time constant in a one-shot multivibrator. The LB8503V then integrates that pulse waveform to create the output driver IC control voltage (a DC voltage).
FG
EDGE pulse
RC pin
Slope due to the RC time constant
One-shot multivibrator TRC(s) = 0.85RC
It is also possible to change the slope of the VCTL/speed relationship as shown in the speed control diagram in the previous section by changing the pulse width with the RC time constant. Note, however, that since pulses determined by this RC time constant are used, variation in the RC components will appear as speed control errors.
No.A0366-8/20
LB8503V
Pin Setting Procedures (Provided for reference purposes) [RC pin] The slope in the speed control diagram is determined by the RC pin time constant.
(RPM) Motor full speed
0%
100%
CTL Duty (%)
I LB01771
1. Determine the FG signal frequency (fFG (Hz)) at the motor's highest speed. (When 2 FG pulses are created on each motor revolution.) fFG(Hz)=2rpm/60 .........................................................(1) 2. Determine the time constant for the RC pin. (Let DUTY be the control duty at the highest motor speed. For example, 100% = 1.0, 60% = 0.6) RxC=DUTY/(3x0.85xfFG) ............................................. (2) 3. Determine the resistor and capacitor values The range of capacitors that can be used is from 0.01 to 0.015 F due to the charge capabilities of the RC pin circuit. Therefore, an appropriate resistor value can be determined from either (3) or (4) below from the result obtained in step 2 above. R=(RxC)/0.01F....................................................... (3) R=(RxC)/0.015F..................................................... (4) Note that the temperature characteristics of the curve are determined by the temperature characteristics of the capacitor connected to the RC pin. A capacitor with excellent temperature characteristics must be used to minimize motor speed variation with temperature.
No.A0366-9/20
LB8503V
[CVO and CVI Pins] These pins determine the origin of the slope. (To set the origin to 0% at 0 rpm, short CVO to CVI.) 1. X axis shift (Resistor dividing the CVO to ground potential)
(RPM) Motor full speed
X axis shift
0%
100%
CTL Duty (%)
To shift the characteristics from a 0% = 0 rpm origin to a situation where the speed at a duty of 30% is shifted to 0%: First, determine the required CVI pin input voltage at 0%. CVI = 6 - (4 x DUTY) = 6 - (4 x 0.3) = 6 - 1.2 = 4.8V Next, when CVO is 6V, determine the resistor values for the resistor divider between CVO and ground such that the midpoint becomes 4.8V. CVO - CVI : CVI - ground = 1.2V : 4.8V = a ratio of 1 : 4. From the above, the desired resistor values will be 20k between CVO and CVI and 80k between CVI and ground. Note that the slope will change. (In this case, since the resistor ratio is 1:4, the result will be 4/5 of (or 0.8 times) the original slope.) If required, the RC pin resistor value must be changed to correct the slope.
LIM VREF SOFT CVI R4 CVO
R5
C CTL CTL
ILB01773
No.A0366-10/20
LB8503V
2. Y axis shift (Resistor dividing the CVO to VCC potential)
(RPM) Motor full speed
X axis shift
0%
100%
CTL Duty (%)
To shift the characteristics from a 0% = 0 rpm origin to a situation where the speed is 0 rpm at a duty of 30%: First, determine the required CVO pin input voltage at 0%. CVO = 6 - (4 x DUTY) = 6 - (4 x 0.25) = 6 - 1 = 5V Determine the resistor values such that at CVO = 5 V, CVI becomes 6V. CVO - CVI : CVI - VCC = 1 V : 6V = a ratio of 1:6. From the above, the desired resistor values will be 20k between CVO and CVI and 80k between CVI and ground. (Due to the current capability of the CVO pin, the total resistor value must exceed 100k.) Note that the slope will change. (In this case, since the resistor ratio is 1:6, the result will be 6/7 of (or 0.86 times) the original slope.) If required, the RC pin resistor value must be changed to correct the slope.
VCC LIM R5 R4 VREF SOFT CVI CVO
C CTL
CTL
ILB01775
No.A0366-11/20
LB8503V
[LIM Pin] The minimum speed is determined by the LIM pin voltage.
(RPM)
Motor full speed
10000
8000
6000
4000
Set minimum 2000 speed 0 0% 6V
CTL Duty (%) CVO pin voltage (V)
100%
2V
1.
Determine the ratio of the required minimum speed and the maximum speed. Ra = minimum speed/maximum speed......... (1) In the example in the figure above, Ra = minimum speed/maximum speed = 3000/10000 = 0.3 Determine the product of the duty that produces the maximum speed and the value from equation 1. Ca = maximum speed duty x Ra .................. (2) For example, Ca = maximum speed duty x Ra = 0.8 x 0.3 = 0.24 Determine the required LIM pin voltage LIM = 6 - (4 x Ca) ....................................... (3) For example, LIM = 6 - (4 x Ca) = 6 - (4 x 0.24) 5V Generate the LIM voltage by resistor dividing the 6 V regulator voltage. For example, the resistor ratio to create a 5V level will be 1:5. Thus the resistor values will be 10k between 6VREG and LIM and 51k between LIM and ground.
2.
3.
4.
6VREG
LIM VREF SOFT CVI
ILB01777
No.A0366-12/20
LB8503V
[C Pin] Since a capacitor that can smooth the pin voltage is connected to the C pin, if the CTL pin input signal frequency is f (Hz), then the capacitor must meet the following condition. (Here, R is the IC internal resistance of 180 (typical).) 1/f = t < RC Note that the larger the capacitor, the slower its response to changes in the input signal will be.
6VREG CTL pin input inverted waveform (the frequency is the same) C pin 180k CTL pin CTL circuit VREF circuit A capacitor that can smooth the pin voltage is connected here. 1/f = t < CR
No.A0366-13/20
LB8503V
Application Example 2
[Setting the minimum speed for an origin of 0% = 0 rpm]
(RPM) Motor full speed
Set minimum speed
0%
PWM Duty(%)
100%
LB8503V
12V C4 VCC VREG FGOUT VREG 6VREG C5 R3
EDGE
FG FGIN
FG
C3 R1 C6 R2
RC
One-shot multivibrator
EI LIM C2 VREF SOFT CVI CVO VREG EO1 VTH
C1
EO3 C CTL signal CTL CTL GND
When the speed control diagram origin is 0% = 0 rpm, the CVO pin is connected to the CVI pin. If the minimum speed is not set, connect the LIM pin to the 6VREG pin.
No.A0366-14/20
LB8503V
Application Example 3
[Origin shift in the Y direction (the motor turns at 0%)]
(RPM) Motor full speed
0%
PWM Duty(%)
100%
LB8503V
12V C4 VCC VREG FGOUT VREG 6VREG C5 R3 One-shot multivibrator
EDGE
FG FGIN
FG
C3
RC
C6
EI LIM VREF SOFT CVI R4 R5 EO3 C CVO VREG C2 EO1 VTH
C1
CTL signal
CTL
CTL GND
When the speed control diagram origin is set so the motor turns at 0%, the CVO pin to ground potential difference is resistor divided and the midpoint is input to the CVI pin. The speed at 0% can be changed with the resistor ratio.
No.A0366-15/20
LB8503V
Application Example 4
[Origin shift in the X axis direction (The motor turns at a duty of 10% or higher) plus a minimum speed setting]
(RPM) Motor full speed
0%
PWM Duty(%)
100%
LB8503V
12V C4 VCC VREG FGOUT VREG 6VREG C5 R3 One-shot multivibrator
EDGE
FG
FGIN
FG
C3
RC
C6
EI LIM VREF EO1 C2 VTH
C1 R5 R4
SOFT CVI CVO VREG
EO3 C CTL signal CTL CTL GND
When the origin in the speed control diagram is set so that the motor starts turning when the duty is above 0%. the potential difference between the CVO pin and VCC is resistor divided, and that divided level is input to the CVI pin. The duty at which rotation starts can be changed by changing the resistor ratio. Note that the total value of the resistors R4 and R5 must exceed 100k.
No.A0366-16/20
LB8503V
Application Example 5
[DC Voltage Speed Control]
(RPM)
Motor full speed
Set minimum speed 0 6V 2V
CV1 pin voltage (V)
LB8503V
12V C4 VCC VREG FGOUT VREG 6VREG
C5 R3
EDGE
FG
FGIN
FG
C3 R1 C6 R2
RC
One-shot multivibrator
EI LIM EO1 C2 VTH VREF
DC voltage
SOFT CVI CVO
VREG
EO3 C CTL CTL GND
When the motor speed is controlled by a DC voltage, that voltage must be in the range from 2V to 6VREG. Note that the motor stops when the control voltage is at 6VREG, and the motor speed increases as the voltage falls.
No.A0366-17/20
LB8503V
Application Example 6
[Fixed Speed + Soft Start]
(RPM) Motor full speed
0%
20%
40%
60%
80%
100%
6V
CTL signal (PWM duty) C pin voltage
LB8503V
12V C4 VCC VREG FGOUT VREG 6VREG
C5 R3
EDGE
FG
FGIN
FG
C3 R1 C6 R2
RC
One-shot multivibrator
EI LIM VREF SOFT CVI CVO VREG C2 EO1 VTH
EO3 C CTL CTL GND
With this circuit, the motor speed remains constant even if there are fluctuations in the supply voltage or static voltage. It is also possible to input a fixed-duty signal to the CTL pin signal input as an input signal for which soft start is enabled at startup.
No.A0366-18/20
LB8503V
Application Example 7
[Used in Combination with the LB11660FV]
LB8503V
12V C4 VREG
LB11660FV/RV
VCC
FGOUT VREG
6VREG C5 R3
EDGE
FG
FGIN
FG
C3 R1 C6 R2
RC
One-shot multivibrator
EI LIM VREF SOFT CVI R4 R5 EO3 C CVO VREG EO1 VTH C2
C1
CTL signal
CTL
CTL GND
In this circuit, the dynamic range of the LB8503V EO pin (the range from the amplifier block output high to output low levels) must be wider than the dynamic range (from the high to low levels of the PWM signal) of VTH pin of driver IC with which this IC is combined. However, since the LB11660FV PWM low-level voltage is lower than the LB8503V amplifier output low-level voltage, it must be resistor divided.
No.A0366-19/20
LB8503V
SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written consent of SANYO Semiconductor Co.,Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO Semiconductor Co.,Ltd. product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. Upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above.
This catalog provides information as of March, 2007. Specifications and information herein are subject to change without notice. PS No.A0366-20/20

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