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ISL97675 PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 ISL97675
部品説明 4-Channel LED Driver
メーカ Intersil Corporation
ロゴ Intersil Corporation ロゴ 



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ISL97675 Datasheet, ISL97675 PDF,ピン配置, 機能
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4-Channel LED Driver with Phase Shift Control
ISL97675
The ISL97675 is an LED driver that drives 4 channels of
low power LEDs from 4.5V to 26V input and up to 45V
output.
The ISL97675 compensates for non-uniformity of the
forward voltage drops in the LED strings with its 4 voltage
controlled-current source channels. Its headroom control
monitors the highest LED forward voltage string for output
regulation, to minimize the voltage headroom and power
loss in the typical multi-string operation.
The ISL97675 offers two PWM Dimming modes: The part
digitizes the incoming 100Hz to 30kHz PWM signal and
provides 8-bit PWM dimming with phase shift function.
Another mode is direct PWM mode without phase shift,
where the dimming frequency follows the input PWM
signal and the minimum on time can be as short as 350ns.
The ISL97675 features channel phase shift control to
minimize the input, output ripple characteristics and load
transients as well as spreading the light output to help
eliminate or reduce the video and audio noise interference
from the backlight driver operation.
Features
• 4 x 30mA Channels
• 45V Output Max
• 4.5V to 26V Input
• Channel Phase Shift PWM Dimming with 8-bit
resolution
• 0.007% Direct PWM dimming at 200Hz
• Current Matching of ±1.5% from 1% ~ 100% Dimming
• Dynamic Headroom Control
• Protections
- String Open/Short Circuit, VOUT Short Circuit
Overvoltage, and Over-temperature Protections
- Optional Master Fault Protection
• Selectable 600kHz or 1.2MHz Switching Frequency
• 20 Ld QFN 4mmx4mm Package
Applications*(see page 19)
• Netbook Displays LED Backlighting
• Notebook Displays LED Backlighting
Typical Application Circuit
VIN* = 4.5V~26V
VOUT = 45V max*
ILED = 30mA PER STRING
ISL97675
17 FAULT
19 VIN
1 VDDIO
SW 16
OVP 14
PGND 15
3 FSW/Phase Shift
2 EN
20 PWM
18 COMP
FB1 12
FB2 11
13 RFPWM/DirectPWM
FB3 7
4 ISET
FB4 6
8 AGND
9 AGND
* VIN 6V
May 19, 2010
FN7630.0
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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