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Preliminary Datasheet BOOST CONTROLLER General Description
AP3039 is a current mode high voltage low-side Nchannel MOSFET controller which is ideal for boost regulators. It contains all the features needed to implement single ended primary topology DC/DC converters. The input voltage range of AP3039 is from 6V to 27V. Its operation frequency is adjustable from 400K to 1MHz. The AP3039 has UVLO (Under Voltage Lock Out) circuit. It uses two external resistors to set the UVLO voltage. The AP3039 also has an over output voltage protection to limit the output voltage. The OVP voltage can be set through external resistors. If the output voltage is higher than the OVP high threshold point, it will disable the driver, when the output voltage drops to the OVP low threshold point, it will enable the driver. It also features a soft start to reduce the inrush current when power on, the soft start time can be set through an external capacitor. AP3039 is available in QFN-3x3-16 package.
AP3039 Features
* * * * * * * * * Input Voltage Range 6V to 27V 0.6A Peak MOSFET Gate Driver 20ns Quick MOSFET Gate Driver Duty Cycle Limit of 90% Programmable UVLO Programmable Over Voltage Protection Cycle by Cycle Current Limit Adjustable Soft-Start Adjustable Operation Frequency from 400 kHz to 1 MHz
Applications
* * Notebook LCD Display Modules
QFN-3x3-16
Figure 1. Package Type of AP3039
May 2008 Rev. 1. 0 1
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet BOOST CONTROLLER Pin Configuration
Pin 1 Identification FN Package (QFN-3x3-16)
OV UVLO SS COMP
16 15 14 13 12
AP3039
EN VIN NC VCC
1 2 3 4 5 6 7 8
NC FB SHDN AGND
EP
11 10 9
Exposed PAD
OUT PGND RT CS Figure 2. Pin Configuration of AP3039 (Top View)
Pin Description
Pin Number 1 2 3, 12 Pin Name EN VIN NC Enable pin Input supply pin, must be locally bypassed No connection 6V linear regulator output pin. VCC is used to bias the gate driver for the external MOSFET. If VIN is less than 8.5V, the VCC is equal to VIN minus drop voltage across bypass switch. This pin should be bypassed to GND (recommend to connect with AGND pin) with a ceramic capacitor Connect this pin to the gate of external MOSFET, the gate driver has 0.6A peak current capability Power ground An external resistor connected from this pin to GND to set the operating frequency Sense switch current pin, which is used for current mode control and for current limit Reference ground This pin can be connected to current matched chip and receives error signal used to shut down the system Voltage Feedback Pin. The reference voltage is 500mV Compensation Pin. This pin is the output of the internal Error Amplifier Function
4
VCC
5 6 7 8 9 10 11 13
OUT PGND RT CS AGND SHDN FB COMP
May 2008 Rev. 1. 0 2
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet BOOST CONTROLLER Pin Description (Continued)
Pin Number 14 Pin Name SS Function An external soft start time capacitor is connected from this pin to ground and is charged by internal 12A current source to control regulator soft start time Two resistors connected from this pin to ground and the VIN pin respectively to set start up and shutdown level Over output voltage protection pin Exposed backside pad. Solder to the circuit board ground plane with sufficient copper connection to ensure low thermal resistance
AP3039
15 16
UVLO OV EP
Functional Block Diagram
REFERENCE BYPASS SWITCH REGULATOR
1.25V
VIN EN UVLO
2 1
4
VCC
EN
REFERENCE
3V
15
R 1.25V 22A CLK S Q DRIVER
5 6
OUT PGND CS
OV
16
1.25V
LOGIC
22A
110mV
8
+
SHDN
10
LEB
SAW
+
COMP
OSTD
0.6V EA 12A
13 11
FB SS
RT
7
OSL
CLK
14 9
AGND
SAW
Figure 3. Functional Block Diagram of AP3039
May 2008 Rev. 1. 0 3
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet BOOST CONTROLLER Ordering Information
AP3039 Circuit Type Package FN: QFN-3x3-16
Package QFN-3x3-16 Temperature Range -40 to 85oC Part Number AP3039FNTR-G1 Marking ID B2A Packing Type Tape & Reel
AP3039
G1: Green TR: Tape and Reel
BCD Semiconductor's products, as designated with "G1" suffix in the part number, are RoHS compliant and Green.
May 2008 Rev. 1. 0 4
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet BOOST CONTROLLER Absolute Maximum Ratings (Note 1)
Parameter Input Voltage VCC Pin Voltage OUT Pin Voltage Feedback Pin Voltage UVLO Pin Voltage CS Pin Voltage SHDN Pin Voltage Enable Pin Voltage OV Pin Voltage Thermal Resistance (Junction to Ambient, no Heat sink) Operating Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10sec) ESD (Machine Model) ESD (Human Body Model) Symbol VIN VCC VOUT VFB VUVLO VCS VSHDN VEN VOV RJA TJ TSTG TLEAD Value 30 10 10 7 7 7 7 VIN 7 60 150 -65 to 150 260 200 2000 Unit V V V V V V V V V
oC/W oC o
AP3039
C
oC
V V
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter Symbol Min Max Unit
Input Voltage
Operating Frequency Operating Temperature
VIN
f TA
6
400 -40
27
1000 85
V
kHz
o
C
May 2008 Rev. 1. 0 5
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet BOOST CONTROLLER Electrical Characteristics
(VIN=12V, VEN =VIN, TA=25oC, unless otherwise specified.)
Parameter Input Voltage Feedback Voltage FB Pin Bias Current Supply Current Shutdown Supply Current VCC Voltage VCC Current Limit Drop Voltage Across Bypass Switch Bypass Switch Turn-off Threshold Bypass Switch Threshold Hysteresis VCC Pin UVLO Rising Threshold VCC Pin UVLO Falling Hysteresis Oscillator Frequency UVLO Threshold UVLO Hysteresis Current Source Current Limit Threshold Voltage RT Voltage Error Amplifier Transconductance EN Pin Threshold Voltage VEL VIH SHDN Pin Threshold Voltage VIL 0.5 2.0 V 0.5 Symbol VIN VFB IFB ICC IQ VCC ICC-LIM VIN-VCC VBYP-HI ICC=0mA, fOSC400kHz, 6VVIN <8.5V VIN increasing Not Switching VEN=0V 9VVIN27V 6VVIN<9V 5.5 5 50 300 8.7 260 4.7 300 Adjustable, RT=51k to 150k 400 1.22 1.25 22 90 1.20 110 1.25 470 2.0 V 130 1.30 1000 1.28 mA mV V mV V mV kHz V A mV V A/V Conditions Min 6 470 500 35 3 1 6 Typ Max 27 530 100 5 2 6.5 Unit V mV nA mA A V
AP3039
VBYP-HYS VIN decreasing VCC-HI VCC-HYS fOSC VUVLO IHYS VCS VRT GS VEH
May 2008 Rev. 1. 0 6
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet BOOST CONTROLLER Electrical Characteristics (Continued)
(VIN=12V, VEN =VIN, TA=25oC, unless otherwise specified.)
Parameter OV Threshold OV Hysteresis Current Source Maximum Duty Cycle Soft Start Current Source Out Pin Rise Time Out Pin Fall Time OUT Dropout Voltage (VCC-VOUT) OUT Low Voltage Level (VOUT) Thermal Shutdown Temperature Thermal Shutdown Hysteresis Symbol VOV IOV-HYS DMAX ISS tRISE tFALL VOUT-H VOUT-L TOTSD THYS Out Pin Load =1nF Out Pin Load =1nF IOUT=50mA IOUT=100mA Conditions Min Typ 1.25 22 90 12 20 20 0.25 0.25 160 20 0.75 0.75 93 Max Unit V A % A ns ns V V
o
AP3039
C
oC
May 2008 Rev. 1. 0 7
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet BOOST CONTROLLER Typical Performance Characteristics AP3039
95 94 93 92
95
IOUT =160mA IOUT = 200mA
94 93 92
fOSC =400kHz fOSC= 1MHz
Efficiency (%)
91 90 89 88 87 86 85 -50
Efficiency (%)
91 90 89 88
VIN=12V, VOUT=33V, fOSC=1MHz L=22H, CIN=10F, COUT=10F
-25 0 25 50
o
87 86 85
IOUT=160mA, VOUT=33V, TA=25 C L=22H, CIN=10F; COUT=10F
6 9 12 15 18 21 24 27
O
75
100
125
Temperature ( C)
Input Voltage (V)
Figure 4. Efficiency vs. Case Temperature
Figure 5. Efficiency vs. Input Voltage
95
92.0
90
91.5
85
Efficiency (%)
80
Efficiency (%)
91.0
90.5
75
90.0
70
65
VIN=12V, VOUT=33V, fOSC=1MHz, TA=25 C L=22H, CIN=10F, COUT=10F
40 60 80 100 120 140 160 180 200
O
89.5
VIN=12V, VOUT=33V, fOSC=1MHz, TA=25 C L=22H, CIN=10F, COUT=10F
18 20 22 24 26 28 30 32 34
O
60 20
89.0 16
Output Current (mA)
Output Voltage (V)
Figure 6. Efficiency vs. Output Current
Figure 7. Efficiency vs. Output Voltage
May 2008 Rev. 1. 0 8
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet BOOST CONTROLLER Typical Performance Characteristics (Continued) AP3039
2.0 1.8 1.6
6.5 6.4 6.3
Supply Current (mA)
VCC Voltage (V)
1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 6 9 12 15 18 21 24 27
6.2 6.1 6.0 5.9 5.8 5.7 5.6 5.5 6 9 12 15 18 21
-50 C O 25 C O 85 C O 125 C
O
-50 C O 25 C O 85 C O 125 C
O
24
27
Input Voltage
Input Voltage (V)
Figure 8. Supply Current vs. Input Voltage
Figure 9. VCC Voltage vs. Input Voltage
1.20
1200 1100
1.15
1000
Frequency (MHz)
1.10
Frequency (kHz)
900 800 700 600 500
1.05
1.00
0.95
RT=51k
400 300 40
0.90 -50
60
80
100
120
140
160
180
-25
0
25
50
O
75
100
125
RT (k)
Case Temperature ( C)
Figure 10. Switching Frequency vs. Case Temperature
Figure 11. Switching Frequency vs. RT Value
May 2008 Rev. 1. 0 9
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet BOOST CONTROLLER Typical Performance Characteristics (Continued) AP3039
1.30 1.29 1.28
1.260
1.255
UVLO Voltage (V)
1.27
RT Voltage (V)
1.250
1.26 1.25 1.24 1.23 1.22 1.21 1.20 6 9 12 15 18 21 24 27
1.245
-50 C O 25 C O 85 C O 125 C
O
1.240
1.235
-50 C O 25 C O 85 C O 125 C
O
1.230 6 9 12 15 18 21 24 27
Input Voltage (V)
Input Voltage (V)
Figure 12. RT Voltage vs. Input Voltage
Figure 13. UVLO Voltage vs. Input Voltage
1.280 1.275 1.270 1.265
25.0
1.260 1.255 1.250 1.245 1.240 1.235 1.230 6 9 12 15 18 21 24 27
UVLO Current (A)
-40 C O 25 C O 85 C O 125 C
O
24.5 24.0 23.5 23.0 22.5 22.0 21.5 21.0 20.5 20.0 6 9 12 15 18 21 24 27
OV Voltage (V)
-40 C O 25 C O 85 C O 125 C
O
Input Voltage (V)
Input Voltage (V)
Figure 14. OV Voltage vs. Input Voltage
Figure 15. UVLO Current vs. Input Voltage
May 2008 Rev. 1. 0 10
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet BOOST CONTROLLER Typical Performance Characteristics (Continued) AP3039
25.0 24.5 24.0 23.5
0.510 0.508 0.506 0.504
OV Current (A)
23.0 22.5 22.0 21.5 21.0 20.5 20.0 6 9 12 15 18 21 24 27
FB Voltage (V)
0.502 0.500 0.498 0.496 0.494 0.492 0.490 -50
-50 C O 25 C O 85 C O 125 C
O
-25
0
25
50
O
75
100
125
Input Voltage (V)
Case Temperature ( C)
Figure 16. OV Current vs. Input Voltage
Figure 17. Feedback Voltage vs. Case Temperature
450 425 400
400 375
OUT Low Voltage (mV)
375 350 325 300 275 250 225 200 175 150 -50 -25 0 25 50
O
OUT Dropout Voltage (mV)
75 100 125
350 325 300 275 250 225 200 175 150 -50
-25
0
25
50
o
75
100
125
Temperature ( C)
Case Temperature ( C)
Figure 18. OUT Low Voltage vs. Case Temperature
Figure 19. OUT Dropout Voltage vs. Case Temperature
May 2008 Rev. 1. 0 11
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet BOOST CONTROLLER Application Information
Operation
AP3039 is a boost DC-DC controller with adjustable operation frequency. Current mode control scheme provides excellent line and load regulation. Operation can be best understood by referring to Figure 3. At the start of each oscillator cycle, the SR latch is set and external power switch Q1 (see Figure 4) turns on and the switch current will increase linearly. The voltage on external sense resistor RCS (see Figure4), connected from CS pin to GND, is proportional to the switch current. This voltage is added to a stabilizing ramp and the result is fed into the non-inversion input of the PWM comparator. When this non-inversion input voltage exceeds inversion input voltage of PWM comparator which is the output voltage of the error amplifier EA, the SR latch is reset and the external power switch turns off. The voltage level at inversion input of PWM comparator sets the peak current level to keep the output voltage in regulation. This voltage level is the amplified signal of the voltage difference between feedback voltage and reference voltage of 0.5V. So, a constant output current can be provided by this operation mode. Input Under-Voltage Detector AP3039 contains an Under Voltage Lock Out (UVLO) circuit. Two resistors R1 and R2 are connected from UVLO pin to ground and VIN pin respectively (see Figure 4). The resistor divider must be designed such that the voltage on the UVLO pin is higher than 1.25V when VIN is in the desired operating range. If the voltage on the pin is below under voltage threshold, all functions of AP3039 are disabled, but the system will remain in a low power standby state. UVLO hysteresis is accomplished through an internal 22A current source which switched on or off 22A current into the impedance of the set-point divider. When the UVLO threshold is exceeded, the current source is activated to instantly raise the voltage on the UVLO pin. When the UVLO pin voltage falls below the threshold the current source is turned off, causing the voltage on the UVLO pin to fall. The formula for UVLO can be expresses as blow: For Input Threshold Voltage VIN_THRESHOLD=1.25V*(R1+R2)/R2 May 2008 Rev. 1. 0 12 For Input Hysteresis Voltage VIN-HYSTERESIS=22A*R1
AP3039
Over Voltage Protection
AP3039 has an over voltage protection (OVP) circuit. The OV Pin is connected to the center tap of R3 and R4 resistor voltage-divider from the high voltage output to GND. (see Figure 21). When the loop is open or the output voltage becomes excessive in any case, result the voltage on OV pin exceeds 1.25V, all functions of AP3039 will be disabled, and the output voltage will fall. OVP hysteresis is accomplished with an internal 22A current source and the operation mode is the same as UVLO. The formula for OVP can be expresses as blow: For OVP Voltage VOVP=1.25V*(R3+R4)/R4 For OVP Hysteresis Voltage VOVP-HYSTERESIS=22A*R3 Frequency Selection An external resistor RT, connected from RT pin to GND, is used to set the operating frequency (see Figure 4). Operation frequency range is from 400kHz to 1MHz (see Table 1). High frequency operation optimizes the regulator for the smallest component size, while low frequency operation can reduce the switch losses.
Table 1. Frequency Selection
Resistance of RT (k) 147 95 68 51 Operating Frequency (kHz) 400 600 800 1000
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet BOOST CONTROLLER Application Information (Continued)
Soft Start AP3039 has a soft start circuit to limit the inrush current during startup. The time of soft start is controlled by an internal 12A current source and an external soft start capacitor CSS connected from SS pin to GND (see Figure 21). The effective CSS voltage for Soft Start is from 0 to 2.3V, the time of Soft Start is: tSS = CSS*2.3V/12A
AP3039
Typical Application
VIN : 6V to 27V
CIN R1
L
D1
VOUT
VIN UVLO OUT CS
RCS
COUT R3
Q1
R5 R4
R2 CV OFF ON
VCC
EN RT OV FB
OFF ON
RT CSS RC CC
SS COMP GND
SHDN
R6
U1 AP3039
Figure 21. AP3039 Application Circuit
May 2008 Rev. 1. 0 13
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet BOOST CONTROLLER Typical Application (Continued)
VIN : 6V to 27V
CIN
AP3039
L
D1
COUT R3
R1
VIN UVLO OUT CS
RCS
Q1
R4
R2
CV
VCC
7 *10
OFF ON
EN RT OV SHDN FB CH 1 SHDN FB VCC
CIN2 0.1F
CH 2
CH7
CH 8 EN
OFF ON
RT CSS RC CC
SS COMP
U2 AP3608
PWM
GND
PWM Dimming
ISET
AGND
PGND
SCE
SCL
SDA
U1 AP3039
AP3608 VCC=5.0V External
Digital Dimming
C: X5R or X7R Dielectric L: SUMIDA CDR6D28MN-220NC Q1: FAIRCHILD FDC5612 D1: FAIRCHILD SS36
Figure 22. AP3039 + AP3608 (Eight Channels Current Sink) Application Circuit
Application Circuit Simple Introduction Figure 22 is an application circuit in which the AP3039 works with AP3608 to drive LED array. The AP3608 acts as an eight-channel constant current sink with current match to drive the LEDs. The SHDN pin and FB pin of AP3608 are the interface terminals to coordinate with the AP3039. The FB pin of AP3608 samples voltage of each channel, and outputs the lowest voltage of all the strings to AP3039.
When there is a shutdown signal on EN pin of AP3608 or all LED channels are inactive, the SHDN pin of AP3608 outputs a low logic signal to turn off AP3039. If AP3608 is on PWM dimming mode, the SHDN pin of AP3608 outputs a signal to AP3039, which is synchronous with PWM.
May 2008 Rev. 1. 0 14
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet BOOST CONTROLLER Mechanical Dimensions QFN-3x3-16 Unit: mm(inch) AP3039
2.900(0.114) 3.100(0.122)
Pin 1 Identification
Pin 1 Identification
Pin1
0.180(0.007) 0.280(0.011) 2.900(0.114) 3.100(0.122) 0.450(0.018) 0.550(0.022) Bottom View Exposed Pad
0.350(0.014) 0.450(0.018)
1.500(0.059) Ref
1.500(0.059) Ref
0.700(0.028) 0.900(0.035) 0.178(0.007) 0.228(0.009) 0.000(0.000) 0.050(0.002)
May 2008 Rev. 1. 0 15
BCD Semiconductor Manufacturing Limited
BCD Semiconductor Manufacturing Limited
http://www.bcdsemi.com
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