KINGBOR KB1365

KB1365
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
2MHz High-Brightness LED Drivers with
High-Side Current Sense and 5000:1 Dimming
Power LED Driver
DESCRIPTION
FEATURES
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.
• 5.5V to 40V Input Voltage Range
• High-Side Current Sense
• 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
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.
• 5V, 10mA On-Board Regulator
• -40кto +125кOperating Temperature Range
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.
• SOT23-6 package
APPLICATIONS
• MR16 and Other LED Bulbs
• Power Led driver
• Constant Current Source!
SIMPLIFIED BLOCk DIAGRAM
TOU(4YPU(
2S
2
*
*
*
4.7␮F
4.7␮F
6).
VCC
IN
REGULATOR
5V
3
See Note2
On Page 4
IN-200mV
20mV
4
–
.-/3
CS
COMPARATOR
+
DRV
CSN
1
1.23V
UVLO
–
#
PWM Signal
5
+
COMPARATOR
1␮F
GATE
DRIVER
GND
DIM
2
DIM
BUFFER
6
KB1365
REV: 1.0
1
KB1365
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
PIN CONFIGURATION
SOT23-6
SOT23-6
CSN 1
6 GND
DIM 2
5 DRV
IN 3
4 VCC
ORDER INFORMATION
Part number
KB1365GRE
Package
SOT23-6,Green
Marking
xxxx,Date Code with one bottom line
PIN DESCRIPTION
PIN
NAME
1
IN
FUNCTION
2
CSN
Current-Sense Input
3
DIM
Logic-Level Dimming Input. Drive DIM low to turn off the current regulator. Drive DIM high to enable
the current regulator.
4
GND
Ground
5
DRV
Gate Drive Output. Connect to the gate of an external n-channel MOSFET.
6
VCC
Voltage Regulator Output. Connect a 1µF capacitor from VCC to GND.
Positive Supply Voltage Input. Bypass with a 1µF 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 = +70°C)
6-Pin SOT ...............................................................350mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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
KB1365
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
RECOMMENDED OPERATION CONDITIONS
Parameter
Symbol
Power supply voltage
Operating temperature
Min.
5.5
-40
VIN
Top
Values
Typ.
ѧ
+25
Max.
40
+125
Unit
V
к
ELECTRICAL CHARACTERISTICS
(VIN = 12V, VDIM = VCC, CVCC = 1µF, RSENSE = 0.51, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
Input Voltage Range
VIN
Maximum Current Regulator
Switching Frequency
fSW
Ground Current
IGND
Supply Current
IIN
Undervoltage Lockout
UVLO
CONDITIONS
MIN
TYP
MAX
UNITS
40.0
V
2
MHz
DRV open
1.5
mA
VDIM < 0.6V
425
µA
5.5
VIN = VCSN = VDIM, VIN rising from 4V until
VDRV > VCC - 0.5V
4.7
5.0
V
VIN = VCSN = VDIM, VIN falling from 6V,
VDRV < 0.5V
4.5
Undervoltage Lockout Hysteresis
0.5
V
SENSE COMPARATOR
Sense Voltage Threshold High
Sense Voltage Threshold Low
VSNSHI
VSNSLO
(VIN - VCSN) rising from 0V until VDRV <
0.5V (25к )
215
220
225
(VIN - VCSN) rising from 0V until VDRV <
0.5V (-40кto +125к)
210
220
230
(VIN - VCSN) falling from 0.26V until VDRV >
(VCC - 0.5V) (25 к )
175
180
185
(VIN - VCSN) falling from 0.26V until VDRV >
(VCC - 0.5V) (-40кto +125к)
170
mV
mV
180
190
Propagation Delay to Output
High
tDPDH
Falling edge of (VIN - VCSN) from 0.26V to
0V to DRV high, CDRV = 1nF
82
ns
Propagation Delay to Output Low
tDPDL
Rising edge of (VIN - VCSN) from 0V to
0.26V to DRV low, CDRV = 1nF
82
ns
Current-Sense Input Current
ICSN
(VIN - VCSN) = 200mV
Current-Sense Threshold
Hysteresis
REV: 1.0
CSHYS
1
µA
0.5V (25к )
40
50
mV
0.5V (-40кto +125к)
40
60
mV
3
KB1365
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
ELECTRICAL CHARACTERISTICS
(VIN = 12V, VDIM = VCC, CVCC = 1µF, RSENSE = 0.51, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
GATE DRIVER
Gate Driver Source Current
VCSN = VIN, VDRV = 0.5 x VCC
Gate Driver Sink Current
VCSN = VIN - 250mV, VDRV = 0.5 x VCC
Gate Driver Output-Voltage High
VOH
IDRV = 10mA
Gate Driver Output-Voltage Low
VOL
IDRV = -10mA
0.5
A
1
A
VCC - 0.5
V
0.5
V
20
kHz
6.0
V
0.6
V
DIM INPUT
Maximum DIM Frequency
fDIM
DIM Input-Voltage High
VIH
VCSN = VIN, increase DIM until VDRV >
(VCC - 0.5V)
DIM Input-Voltage Low
VIL
VCSN = VIN, decrease DIM until
VDRV < 0.5V
DIM Hysteresis
DIMHYS
DIM Turn-On Time
tDIMON
DIM Turn-Off Time
tDIMOFF
2.8
200
mV
DIM rising edge to VDRV = 0.5 x VCC,
CDRV = 1nF
100
ns
DIM falling edge to VDRV = 0.5 x VCC,
CDRV = 1nF
100
ns
DIM Input Leakage High
VDIM = VIN
10
µA
DIM Input Leakage Low
VDIM = 0V
-1
+1
µA
IVCC = 0.1mA to 10mA, VIN = 5.5V to 40V
4.5
5.5
V
IVCC = 0.1mA to 10mA, VIN = 5.5V to 40V
4.0
5.5
VCC REGULATOR
Regulator Output Voltage
VCC
Load Regulation
IVCC = 0.1mA to 10mA, VIN = 12V
Line Regulation
Power-Supply Rejection Ratio
Current Limit
Regulator Startup Time
PSRR
ILIM
tSTRAT
V
4
Ω
mV
VIN = 6V to 40V, IVCC = 10mA
11
VIN = 12V, IVCC = 5mA, fIN = 10kHz
-35
dB
VIN = 5.5V, VCC = 0V
45
mA
VIN = 5.5V, VCC = 4V
18
mA
VCC = 0 to 5.5V
350
us
Note 1: All devices are 100% production tested at TJ = +25°C and +125°C. Limits to -40°C are guaranteed by design.
Note 2: Vin Bypass Capacitor
DIM(6V max)
LED+ LED
Rs
4 7uF
4 7uF
1uF
VIN
2 2R
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 2.2Ω resistor in series
with an X5R ceramic capacitor will minimize start-up
voltage transients.
L
D
100uH
KB1365
NMOS
GND
Layout suggestion
REV: 1.0
4
KB1365
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
TYPICAL PERFORMANCE CHARACTERISTICS
(VIN = VDIM = 12V, CVCC = 1µF, RSENSE = 0.51 connected between IN and CSN. Typical values at TA = +25°C, unless otherwise
noted.)
DRV SWITCHING FREQUENCY
vs. VIN
DRV SWITCHING FREQUENCY (kHz)
1,3 and 7 LEDs
L = 100 ␮H
100
7 Led
3 Led
Efficiency (%)
90
85
1 Led
80
75
70
65
60
0
10
20
30
LED 3
LED 2
LED 1
L = 47µH
8
12
20
26
32
2.0
VCC vs. VIN
1.0
LED 1
5.40
5.4
5.39
5.3
5.38
5.37
5.1
5.36
VCC (V)
5.2
5.0
0
-0.5
-1.0
-1.5
5.34
4.8
5.33
4.7
5.32
5
15
20
25
40
30
VIN (V)
SUPPLY CURRENT vs. VIN
VIN = 24V
450
VIN = 12V
400
350
VDIM = 0V
VDIM = 0V
5.30
5.0 7.5 10.0 12.5 15.0 17.5 20.0 22.5 25.0 40
LED 5
500
5.31
ILED = 0
4.5
-40 -25 -10 5 20 35 50 65 80 95 110 125
VIN (V)
4.5
8.5
12.5
16.5
20.5
24.5
40
VIN (V)
TEMPERATURE (°C)
PWM DIMMING AT 200Hz
(10% DUTY CYCLE)
PWM DIMMING AT 200Hz
(90% DUTY CYCLE)
VIN = 12V, L = 47µH,
1 LED
VIN = 12V, L = 47µH,
1 LED
VDIM
2V/div
VDIM
2V/div
0V
0V
ILED
200mA/div
ILED
200mA/div
0A
REV: 1.0
LED 4
LED 3
-2.0
40
5.35
4.9
1ms/div
LED 2
0.5
VCC vs. TEMPERATURE
5.5
4.6
ILED(NOMINAL) = 400mA
L = 100 µH
1.5
VIN (V)
Supply Voltage VIN (V)
VCC (V)
LED 5
LED 4
0
40
LED CURRENT VARIATION vs. VIN
SUPPLY CURRENT (µA)
95
1500
1400
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
LED CURRENT VARIATION FROM SET CURRENT (%)
EFFICIENCY vs. VIN
0A
1ms/div
5
KB1365
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
TYPICAL PERFORMANCE CHARACTERISTICS
(VIN = VDIM = 12V, CVCC = 1µF, RSENSE = 0.51 connected between IN and CSN. Typical values at TA = +25°C, unless otherwise
noted.)
PWM DIMMING AT 200Hz
(1% DUTY CYCLE)
PWM DIMMING EXPANDED
(50% DUTY CYCLE)
VIN = 12V, L = 47µH,
1 LED
VIN = 24V, L = 33µH,
4 LEDS
VIN = 12V, L = 47µH,
1 LED
VDIM
2V/div
VDIM
2V/div
VDIM
2V/div
0V
0V
0V
ILED
200mA/div
ILED
200mA/div
ILED
200mA/div
0A
0A
0A
1µs/div
PWM DIMMING AT 20kHz
(10% DUTY CYCLE)
PWM DIMMING AT 20kHz
(90% DUTY CYCLE)
4µs/div
ILED VARIATION vs. TEMPERATURE
VIN = 24V, L = 33µH,
4 LEDS
VIN = 24V, L = 47µH,
4 LEDS
VDIM
2V/div
VDIM
2V/div
0V
0V
ILED
200mA/div
ILED
200mA/div
0A
0A
10µs/div
LED CURRENT VARIATION FROM SET CURRENT (%)
10µs/div
10µs/div
PWM DIMMING EXPANDED
(50% DUTY CYCLE)
2.0
ILED(NOMINAL) = 400mA
L = 100 µH
1.5
1.0
VIN = 24V
0.5
0
-0.5
-1.0
VIN = 12V
-1.5
VDIM = 0V
-2.0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
REV: 1.0
6
KB1365
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
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.
5V Regulator
VCC is the output of a 5V regulator capable of sourcing
10mA. Bypass VCC to GND with a 1µF 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.
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.
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 =
(VIN − n × VLED ) × n × VLED × RSENSE
VIN × ∆V × L
where n = number of LEDs, VLED = forward voltage
drop of one LED, and 6V = (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 (⍀)
Nominal average
output current (mA)
0.1
2000
0.2
0.57
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
KB1365
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
APPLICATION CIRCUIT
VIN
6V to 40V
100uH
1N5819
See Note2
On Page 4
1␮F
3 IN
1 CSN
L
4.7␮F
*
*
*
2.2R 4.7␮F
0.2R
#
2
VCC
KB1365
DIM
DRV
GND
4
5
KBM2302CA:20V/3.6A SOT23
KBM2360CA:60V/2.5A SOT23
6
PWM Signal or Vcc
Figure 1a.KB1365 Typical Application Circuit with 1A Output .
VIN
6V to 40V
100uH
1N5819*2
See Note2
On Page 4
1␮F
3 IN
1 CSN
L
4.7␮F
*
*
*
2.2R 4.7␮F
0.1R
#
2
DIM
VCC
KB1365
DRV
GND
4
5
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
KB1365
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
PACAGE DESCRIPTION
Small Outline SOT23-6
PACKAGE OUTLINE
PAD LAYOUT DETAILS
e
b
L
E1
E
a
e1
D
A
2
DATUM A
C
A2
A1
CONTROLLING DIMENSIONS IN MILLIMETRES APPROX CONVERSIONS INCHES.
PACKAGE DIMENSIONS
Millimetres
Inches
DIM
Millimetres
Inches
DIM
Min
Max
Min
Max
Min
Max
Min
Max
A
0.90
1.45
0.35
0.057
E
2.60
3.00
0.102
0.118
A1
0.00
0.15
0
0.006
E1
1.50
1.75
0.059
0.069
A2
0.90
1.30
0.035
0.051
L
0.10
0.60
0.004
0.002
b
0.35
0.50
0.014
0.019
e
C
D
0.09
0.20
0.0035
0.008
e1
2.80
3.00
0.110
0.118
L
Kingbor Technology
TEL:(86)0755-26508846 FAX:(86)0755-26509052 www.kingbor.com
0.95 REF
1.90 REF
0°
10°
0.037 REF
0.074 REF
0°
10°
9