參數(shù)資料
型號: P95020NQG8
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: 電源管理
英文描述: 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC132
封裝: 10 X 10 MM, 0.85 MM HEIGHT, QFN-132
文件頁數(shù): 168/169頁
文件大?。?/td> 4297K
代理商: P95020NQG8
IDTP95020
Product Datasheet
September 2, 2011 Revision 1.3 Final
98
2011 Integrated Device Technology, Inc.
LED BOOST CONVERTER AND CURRENT SINKS
Features
Fully controllable by a host or I2C interface
Peak efficiency > 88% with two strings of 10 LEDs
Low Shutdown Current (<1uA)
0.5MHz or 1MHz fixed frequency low noise
operation
Supports up to two (2) strings of 3 to 10
series-connected white LEDs
- Programmable Sink current:
- 0-25 mA per string or 0-50mA for one string only
- Half range setting also available
Soft Start and Sink Current Slew Rate Control
Programmable Over-Current Protection through
external sense resistor
Programmable Over Voltage Protection through
external resistor divider
UVLO shutdown protection
Description
The LED BOOST is a current mode PWM boost converter
that provides power to one or two strings of white or
colored LEDs as used in LCD displays and keyboard
backlighting. The converter is fully compensated and
requires no additional external components for stable
operation at a user-selectable switching frequency of
either 1MHz or 500kHz. The converter also includes two
regulated current sink drivers with internal FETs, providing
two outputs each for controlling the same number of LEDs
up to 25 mA each or a single (combined) output up to 50
mA total.
Safe operation is ensured by a user
programmable over-current limiting function and by output
over-voltage protection.
Figure 28 – White LED Boost and Sink Driver Block Diagram
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