中文
English8-Channels LED Driver CXLE81109B/C/L is an integrated power LED backlight driver that controls 8 channels of LED current for LCD backlight applications such as notebook computer and LCD monitor
目录
产品概述 返回TOP
The CXLE81109B/C/L is an integrated power LED backlight driver that controls 8 channels of LED current for LCD backlight applications such as notebook computer and LCD monitor. The CXLE81109B/C/L is a current mode boost converter integrated with 48V/2.5A power switch drivers the LED array. The CXLE81109B/C/L’s 8 channels of voltage controlled current sinks with current matching within 1.5%, which compensate for the non-uniformity effect of forward voltage variance in the LED stacks. To minimize the voltage headroom and power loss in the typical multi-strings operation, the CXLE81109B/C/L monitors the total highest LED forward voltage string and uses its feedback signal for output regulation. A SET pin is used for programming maximum LED current. A high contrast ratio true PWM dimming can be achieved by driving PWM pin with a PWM signal. LED current is proportional to the PWM pin duty. The CXLE81109B/C/L features extensive protection functions that include OLP, OCP, OVP and OTP. It is available in a TQFN4X4-24 & TSSOP-20 (FD) package.
产品特点 返回TOP
„ 8 Channels
„ 4.2V to 24V Input Supply
„ 48V Maximum Output Voltage
„ Channel Full current Programmable up to 30mA
„ Current Matching 1.5%
„ Highest Vf String Detection for Regulation
„ High Accuracy Digital Dimming by PWM Pin
„ Automatic Connect/Disconnect LED
„ 1MHz Switching Frequency
„ Power sequence free for EN,PWM and VIN
„ Protections: Š Open LED Protection (OLP)
Š Over Current Protection (OCP)
Š Over Voltage Lockout (OVP)
Š Over Temperature Protection (OTP)
„ TQFN4X4-24 & TSSOP-20 (FD) Package
„ RoHS Compliant
应用范围 返回TOP
„ Notebook Display LED Backlighting
„ LCD Monitor LED Backlighting
„ LCD TV LED Backlighting
„ Automotive Display Backlighting
技术规格书（产品PDF) 返回TOP
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LED Backlight Driver |
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Part NO. |
Vin(V) min. |
Vin(V) max. |
CH |
VOUT (max) |
ISW (A) |
FSW (kHz) |
VLED FB(V) |
Note |
Package |
|
2.5 |
5.5 |
1 |
20 |
1.2 |
1000 |
0.1/0.2 / 0.3 |
LX,GND,FB,EN,OVP,VIN,EN Dimming 100~200kHz,6SxP |
TSOT23-6 |
|
|
2.5 |
5.5 |
1 |
40 |
1.2 |
1000 |
0.2 |
LX,GND,FB,EN,OVP,VIN,EN Dimming 100~200kHz |
TSOT23-6 |
|
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