KB1365 Datasheet, PDF (1/9 Pages) Kingbor Technology Co – 2MHz High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming

Kingbor Technology Co.,Ltd
TEL:[phone] FAX:[phone]
KB1365
Power LED Driver 2MHz High-Brightness LED Drivers with
High-Side Current Sense and 5000:1 Dimming
FEATURES
• 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
• 5V, 10mA On-Board Regulator
• -40кto +125^кOperating Temperature Range
• SOT23-6 package
APPLICATIONS
• MR16 and Other LED Bulbs
• Power Led driver
• Constant Current Source!
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 high-
side 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 current-
sensing and an integrated current-setting circuitry minim-
ize the number of external components while deliv-
ering an LED current with +/-5% accuracy. A hys-
teretic 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.
SIMPLIFIED BLOCk DIAGRAM
2S
6).
TOU(4YPU(
*
*
IN
3
* See Note2
On Page 4
CSN
1
REGULATOR
5V
IN-200mV
20mV
–
CS
+^COMPARATOR
1.23V
+
C–^UO^VM^LPA^ORATOR
GATE
DRIVER
VCC
4
1␮F
DRV
5
.-/3

#

 <sup>

</sup>
PWM Signal
DIM
2
DIM
BUFFER
GND
6
KB1365
REV: 1.0
1