Preliminary
QX7135
Constant Current LED Driver QX7135
General Description
THE QX7135 is a constant current regulator f...
Preliminary
QX7135
Constant Current LED Driver QX7135
General Description
THE QX7135 is a constant current
regulator for driving LEDs with low quiescent current and low dropout voltage. The current ranges from 100mA to 400mA with 10mA step. No external com ponent is required to achieve a constant current LED driver. Soft start, therm al protection and low voltage protection are also provided.
Features
y Sink current: 100mA to 400mA with 10mA step. y Power supply voltage: 2.7-6V y Low drop out voltage: 150mV@350mA y Low quiescent current: 250uA y Thermal protection y Soft start y Low voltage protection: 2.5V y SOT-89-3 and TO-252-2 packages
Ordering Information
QX7135 X
XX
Applications
Sink Current:
10: 100mA 11: 110mA … 39: 390mA 40: 400mA
y Power Led driver
Package Type:
T: SOT-252-2 E: SOT-89-3
Block Diagram and Typical Applications
2.7-6V
Low voltage protection Thermal protection bandgap Soft start
VDD LED
50mV
QX7135 GND
QX Micro Devices Co., Ltd.
1
of 5
http://www.Datasheet4U.com
Preliminary
QX7135
Pin Assignment
QX7135EXX (SOT-89-3) 1 LED 2 GND 3 VDD LED
QX7135TXX (TO-252-2)
1
2 GND
3 VDD
Absolute Maximum Ratings
Type Voltage Symbol Vmax Vmin-max Current Power dissipation ILEDmax PSOT-89-5 PSOT-252-3 Description Maximum voltage on VDD and LED pins Voltage range on LED pin Maximum current on LED pin Maximum Power dissipation for SOT-89-3 package Maximum Powe r di ssipation f or S OT-252-2 package Operation temperature range torage temperature ra...