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Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KB1365
DESCRIPTION
The KB1365, step-down constant-current high-brightness LED (HB LED) drivers provide a cost-effective solution for automotive interior/exterior lighting,architectural and ambient lighting, LED bulbs such as MR16 and other LED illumination applications. The KB1365 operate from a 5.5V to 40V input voltage range and feature a 5V/10mA on-board regulator. A highside current-sense resistor adjusts the output current and a dedicated PWM input (DIM) enables a wide range of pulsed dimming. The KB1365 is well suited for applications requiring a wide input voltage range. The high-side currentsensing and an integrated current-setting circuitry minimize the number of external components while delivering an LED current with +/-5% accuracy. A hysteretic control algorithm ensures excellent input-supply rejection and fast response during load transients and PWM dimming. The KB1365 features a 20% inductor current ripple. These devices operate up to 2MHz switching frequency, thus allowing for small component size.
Power LED Driver
FEATURES
* 5.5V to 40V Input Voltage Range * High-Side Current Sense
2MHz High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming
* 20kHz Maximum Dimming Frequency * Hysteretic Control: No Compensation * 200mV Low Reference Voltage(5%) * Dedicated Dimming Control Input * Up to 2MHz Switching Frequency * Adjustable Constant LED Current * Up to 5A Constant Current Output * 5V, 10mA On-Board Regulator * -40 to +125 Operating Temperature Range * SOT23-6 package
APPLICATIONS
* MR16 and Other LED Bulbs * Power Led driver * Constant Current Source
SIMPLIFIED BLOCk DIAGRAM
COMPARATOR
CSN
1.23V
COMPARATOR
DIM
2
PWM Signal
DIM BUFFER
REV: 1.0
-
+
1
-
* * *
4.7 F
4.7 F
IN
VCC
3
See Note2 On Page 4
REGULATOR 5V
4
1F
IN-200mV 20mV
CS
+
UVLO GATE DRIVER
DRV
5
GND
6 KB1365
1
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KB1365
PIN CONFIGURATION
SOT23-6
SOT23-6
CSN 1 DIM 2 IN 3
6 GND 5 DRV 4 VCC
ORDER INFORMATION
Part number
KB1365GRE
Package
SOT23-6,Green
Marking
xxxx,Date Code with one bottom line
PIN DESCRIPTION
PIN 1 2 3 4 5 6 NAME IN CSN DIM GND DRV VCC Current-Sense Input Logic-Level Dimming Input. Drive DIM low to turn off the current regulator. Drive DIM high to enable the current regulator. Ground Gate Drive Output. Connect to the gate of an external n-channel MOSFET. Voltage Regulator Output. Connect a 1F capacitor from VCC to GND. FUNCTION Positive Supply Voltage Input. Bypass with a 1F or higher value capacitor to GND.
SOT23-6
ABSOLUTE MAXIMUM RATINGS
IN, CSN, DIM to GND .............................................-0.3V to +40V VCC, DRV to GND ....................................................-0.3V to +6V CSN to IN...............................................................-0.3V to +0.3V Maximum Current into Any Pin (except IN, VCC, and DRV)............................................20mA Continuous Power Dissipation (TA = +70C) 6-Pin SOT ...............................................................350mW Operating Temperature Range .........................-40C to +125C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Pin-to-Pin ESD Ratings (HB Model).....................................2.5kV *As per JEDEC51 Standard (Single-Layer Board).
Stresses beyond 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 in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
REV: 1.0
2
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KB1365
RECOMMENDED OPERATION CONDITIONS
Parameter Power supply voltage Operating temperature Symbol VIN Top Min. 5.5 -40 Values Typ. +25 Max. 40 +125 Unit V
ELECTRICAL CHARACTERISTICS
(VIN = 12V, VDIM = VCC CVCC = 1F, RSENSE = 0.5 , TA = TJ = -40C to +125C, unless otherwise noted. Typical values are at , TA = +25C.) (Note 1)
PARAMETER Input Voltage Range Maximum Current Regulator Switching Frequency Ground Current Supply Current SYMBOL VIN fSW IGND IIN DRV open VDIM < 0.6V VIN = VCSN = VDIM, VIN rising from 4V until VDRV > VCC - 0.5V VIN = VCSN = VDIM, VIN falling from 6V, VDRV < 0.5V Undervoltage Lockout Hysteresis SENSE COMPARATOR (VIN - VCSN) rising from 0V until VDRV < 0.5V (25 ) Sense Voltage Threshold High VSNSHI (VIN - VCSN) rising from 0V until VDRV < 0.5V (-40 to +125 ) (VIN - VCSN) falling from 0.26V until VDRV > (VCC - 0.5V) (25 ) (VIN - VCSN) falling from 0.26V until VDRV > (VCC - 0.5V) (-40 to +125 ) Falling edge of (VIN - VCSN) from 0.26V to 0V to DRV high, CDRV = 1nF Rising edge of (VIN - VCSN) from 0V to 0.26V to DRV low, CDRV = 1nF (VIN - VCSN) = 200mV 0.5V (25 ) 40 40 0.5V (-40 to +125 ) 215 210 175 170 220 220 180 180 82 82 1 50 60 225 mV 230 185 mV 190 ns ns A mV mV 0.5 4.7 CONDITIONS MIN 5.5 TYP MAX 40.0 2 1.5 425 5.0 V 4.5 V UNITS V MHz mA A
Undervoltage Lockout
UVLO
Sense Voltage Threshold Low
VSNSLO
Propagation Delay to Output High Propagation Delay to Output Low Current-Sense Input Current Current-Sense Threshold Hysteresis
tDPDH tDPDL ICSN CSHYS
REV: 1.0
3
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KB1365
ELECTRICAL CHARACTERISTICS
(VIN = 12V, VDIM = VCC CVCC = 1F, RSENSE = 0.5 , TA = TJ = -40C to +125C, unless otherwise noted. Typical values are at , TA = +25C.) (Note 1)
PARAMETER GATE DRIVER Gate Driver Source Current Gate Driver Sink Current Gate Driver Output-Voltage High Gate Driver Output-Voltage Low DIM INPUT Maximum DIM Frequency DIM Input-Voltage High DIM Input-Voltage Low DIM Hysteresis DIM Turn-On Time DIM Turn-Off Time DIM Input Leakage High DIM Input Leakage Low VCC REGULATOR Regulator Output Voltage Load Regulation Line Regulation Power-Supply Rejection Ratio Current Limit Regulator Startup Time PSRR ILIM tSTRAT VCC IVCC = 0.1mA to 10mA, VIN = 5.5V to 40V IVCC = 0.1mA to 10mA, VIN = 5.5V to 40V IVCC = 0.1mA to 10mA, VIN = 12V VIN = 6V to 40V, IVCC = 10mA VIN = 12V, IVCC = 5mA, fIN = 10kHz VIN = 5.5V, VCC = 0V VIN = 5.5V, VCC = 4V VCC = 0 to 5.5V 4.5 4.0 4 11 -35 45 18 350 5.5 5.5 V V mV dB mA mA us fDIM VIH VIL DIMHYS tDIMON tDIMOFF DIM rising edge to VDRV = 0.5 x VCC, CDRV = 1nF DIM falling edge to VDRV = 0.5 x VCC, CDRV = 1nF VDIM = VIN VDIM = 0V -1 VCSN = VIN, increase DIM until VDRV > (VCC - 0.5V) VCSN = VIN, decrease DIM until VDRV < 0.5V 200 100 100 10 +1 2.8 20 6.0 0.6 kHz V V mV ns ns A A VOH VOL VCSN = VIN, VDRV = 0.5 x VCC VCSN = VIN - 250mV, VDRV = 0.5 x VCC IDRV = 10mA IDRV = -10mA VCC - 0.5 0.5 0.5 1 A A V V SYMBOL CONDITIONS MIN TYP MAX UNITS
Note 1: All devices are 100% production tested at TJ = +25C and +125C. Limits to -40C are guaranteed by design. Note 2: Vin Bypass Capacitor
2 2R
1uF
Many types of capacitors can be used for input bypassing, however, caution must be exercised when using multilayer ceramic capacitors. Because of the self-resonant and high Q characteristics of some types of ceramic capacitors, high voltage transients can be generated under some start-up conditions, such as connecting the charger input to a live power source. Adding a 2.2 resistor in series with an X5R ceramic capacitor will minimize start-up voltage transients.
DIM(6V max)
Rs
LED+ LED
D
VIN
4 7uF 4 7uF
L
100uH
KB1365 NMOS
GND
Layout suggestion
REV: 1.0
4
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KB1365
TYPICAL PERFORMANCE CHARACTERISTICS
(VIN = VDIM = 12V, CVCC = 1F, RSENSE = 0.5 noted.)
EFFICIENCY vs. VIN
1,3 and 7 LEDs L = 100 H
connected between IN and CSN. Typical values at TA = +25C, unless otherwise
DRV SWITCHING FREQUENCY vs. VIN
1500 1400 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0 0 LED CURRENT VARIATION FROM SET CURRENT (%) 2.0 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 -2.0 5 LED 5 LED 4 LED 3 LED 2 LED 1
LED CURRENT VARIATION vs. VIN
ILED(NOMINAL) = 400mA L = 100 H LED 1 LED 2
100 95
3 Led 7 Led
90
Efficiency (%)
85 80 75 70 65 60 0 10 20
Supply Voltage VIN (V) 1 Led
DRV SWITCHING FREQUENCY (kHz)
L = 47H 8 12 20 VIN (V) 26 32 40
LED 3 15 20
LED 4 25 VIN (V)
LED 5 30 40
30
40
VCC vs. VIN
5.5 5.4 5.3 5.2 VCC (V) VCC (V) 5.1 5.0 4.9 4.8 4.7 4.6 4.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0 22.5 25.0 40 VIN (V) ILED = 0 5.40 5.39 5.38 5.37 5.36 5.35 5.34 5.33 5.32 5.31 5.30
VCC vs. TEMPERATURE
500 VIN = 24V 450 VIN = 12V SUPPLY CURRENT (A) 400 350
SUPPLY CURRENT vs. VIN
VDIM = 0V -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (C) 4.5 8.5 12.5 16.5 VIN (V) 20.5
VDIM = 0V 24.5 40
PWM DIMMING AT 200Hz (10% DUTY CYCLE)
VIN = 12V, L = 47H, 1 LED VDIM 2V/div
PWM DIMMING AT 200Hz (90% DUTY CYCLE)
VIN = 12V, L = 47H, 1 LED VDIM 2V/div 0V ILED 200mA/div 0A
0V ILED 200mA/div 0A
1ms/div
1ms/div
REV: 1.0
5
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KB1365
TYPICAL PERFORMANCE CHARACTERISTICS
(VIN = VDIM = 12V, CVCC = 1F, RSENSE = 0.5 noted.) connected between IN and CSN. Typical values at TA = +25C, unless otherwise
PWM DIMMING AT 200Hz (1% DUTY CYCLE)
VIN = 12V, L = 47H, 1 LED VDIM 2V/div
PWM DIMMING EXPANDED (50% DUTY CYCLE)
VIN = 24V, L = 33H, 4 LEDS VDIM 2V/div
PWM DIMMING EXPANDED (50% DUTY CYCLE)
VIN = 12V, L = 47H, 1 LED VDIM 2V/div
0V ILED 200mA/div 0A
0V ILED 200mA/div 0A
0V ILED 200mA/div 0A
10s/div
1s/div
4s/div
PWM DIMMING AT 20kHz (10% DUTY CYCLE)
VIN = 24V, L = 47H, 4 LEDS VDIM 2V/div 0V ILED 200mA/div 0A
PWM DIMMING AT 20kHz (90% DUTY CYCLE)
LED CURRENT VARIATION FROM SET CURRENT (%) VIN = 24V, L = 33H, 4 LEDS VDIM 2V/div 0V ILED 200mA/div 2.0 1.5 1.0 0.5 0 -0.5 -1.0 -1.5
ILED VARIATION vs. TEMPERATURE
ILED(NOMINAL) = 400mA L = 100 H
VIN = 24V
VIN = 12V
0A
VDIM = 0V
-2.0 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (C)
10s/div
10s/div
REV: 1.0
6
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KB1365
a dedicated PWM dimming input (DIM) allows for a wide range of independent pulsed dimming. The high-side current-sensing scheme and on-board current-setting circuitry minimize the number of external components while delivering LED current with a 5% accuracy, using a 1% sense resistor. See the Functional Diagram. For the values of VSNSHI and VSNSLO, see the Electrical Characteristics.
Detailed Description
The KB1365 are step-down, constantcurrent, high-brightness LED (HB LED) drivers. These devices operate from a 5.5V to 40V input voltage range and provide up to 0.5A of source and 1A of sink drive capability to the gate of an external MOSFET. A highside current-sense resistor sets the output current and
Undervoltage Lockout (UVLO)
The KB1365 include a 5.0V undervoltage lockout (UVLO) with 500mV hysteresis. When VIN falls below 4.5V, DRV goes low, turning off the external n-channel MOSFET. DRV goes high once VIN is 5V or higher.
Current Regulator Operation
The KB1365 regulate the LED output current using an input comparator with hysteresis (Figure 1). As the current through the inductor ramps up and the voltage across the sense resistor reaches the upper threshold, the voltage at DRV goes low, turning off the external MOSFET. The MOSFET turns on again when the inductor current ramps down through the freewheeling diode until the voltage across the sense resistor equals the lower threshold. Use the following equation to determine the operating frequency: fSW =
5V Regulator
VCC is the output of a 5V regulator capable of sourcing 10mA. Bypass VCC to GND with a 1F capacitor.
DIM Input
The KB1365 allow dimming with a PWM signal at the DIM input. A logic level below 0.6V at DIM forces the KB1365's DRV output low, turning off the LED current. To turn the LED current on, the logic level at DIM must be at least 2.8V.
(VIN - n x VLED ) x n x VLED x RSENSE
VIN x V x L
where n = number of LEDs, VLED = forward voltage drop of one LED, and V = (VSNSHI - VSNSLO).
Applications Information
Setting nominal average output current with external resistor RS The nominal average output current in the LED(s) is determined by the value of the external current sense resistor (RS) connected between VIN and CSN and is given by: IOUTnom = 0.2/RS The table below gives values of nominal average output current for several preferred values of current setting resistor (RS) in the typical application circuit shown on page 1: RS ( ) 0.1 0.2 0.57 Nominal average output current (mA) 2000 1000 350
Rs Power (w) Rs selection
0.4 0.2 0.07 0805:0.3R//0.3R//0.3R 0805:0.1R+0.1R 0805:1R//2.2R//3.6R
Inductor selection
Recommended inductor values for the KB1365 are in the range 22 H to 220 H(100 H Typ.).
REV: 1.0
7
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KB1365
APPLICATION CIRCUIT
VIN 6V to 40V 0.2R 2.2R 4.7 F
L
* * *
4.7 F
100uH
1N5819
See Note2 On Page 4
1F
3 IN 1 CSN 2
DIM VCC
4 5
KB1365
DRV
KBM2302CA:20V/3.6A SOT23 KBM2360CA:60V/2.5A SOT23
GND
6
PWM Signal or Vcc
Figure 1a.KB1365 Typical Application Circuit with 1A Output .
VIN 6V to 40V 0.1R 2.2R 4.7 F
L
* * *
4.7 F
100uH
1N5819*2
See Note2 On Page 4
1F
3 IN 1 CSN 2
DIM VCC
4 5
KB1365
DRV
GND
6
KBM2302CA:20V/3.6A SOT23 KBM2360CA:60V/2.5A SOT23 CEU6426:60V 15A,NMOS,TO-252(D-PAK)
PWM Signal or Vcc
Figure 1a.KB1365 Typical Application Circuit with 2A Output .
REV: 1.0
8
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KB1365
PACAGE DESCRIPTION
Small Outline SOT23-6
PACKAGE OUTLINE PAD LAYOUT DETAILS
b
e L
2
E
E1
e1 D A A2
a
DATUM A
C
A1
CONTROLLING DIMENSIONS IN MILLIMETRES APPROX CONVERSIONS INCHES.
PACKAGE DIMENSIONS
Millimetres DIM Min A A1 A2 b C D 0.90 0.00 0.90 0.35 0.09 2.80 Max 1.45 0.15 1.30 0.50 0.20 3.00 Min 0.35 0 0.035 0.014 0.0035 0.110 Max 0.057 0.006 0.051 0.019 0.008 0.118 E E1 L e e1 L Inches DIM Min 2.60 1.50 0.10 Max 3.00 1.75 0.60 Min 0.102 0.059 0.004 Max 0.118 0.069 0.002 Millimetres Inches
0.95 REF 1.90 REF 0 10
0.037 REF 0.074 REF 0 10
Kingbor Technology
TEL:(86)0755-26508846 FAX:(86)0755-26509052 www.kingbor.com
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