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Single or Multiple Cell Li-ion Battery Powered
4-Channel and 6-Channel LED Drivers
ISL97692, ISL97693, ISL97694A
The ISL97692, ISL97693, ISL97694A are Intersil’s highly
integrated 4- and 6-channel LED drivers for display
backlighting . These parts maximize battery life by featuring
only 1mA quiescent current, and by operating down to 2.4V
input voltage, with no need for higher voltage supplies.
The ISL97692 has 4 channels and provides 8-bit PWM
dimming with adjustable dimming frequency up to 30kHz. The
ISL97693 has 6 channels with Direct PWM dimming control.
The ISL97694A has 6 channels and provides 8-, 10-, or 12-bit
PWM dimming with adjustable dimming frequency up to
30kHz, 7.5kHz, or 1.875kHz, respectively, controlled with I 2 C
or PWM input.
ISL97692 and ISL97694A feature phase shifting that may be
enabled optionally, with a phase delay between channels
optimized for the number of active channels. In ISL97694A,
phase shifting can multiply the effective dimming frequency by
6 allowing above-audio PWM dimming with 10-bit dimming
resolution.
The ISL97692/3/4A employ adaptive boost architecture,
which keeps the headroom voltage as low as possible to
maximize battery life while allowing ultra low dimming duty
cycle as low as 0.005% at 100Hz dimming frequency in Direct
PWM mode.
The ISL97692/3/4A incorporate extensive protection
functions including string open and short circuit detections,
OVP, and OTP.
The ISL97692/3 are offered in the 16 Ld 3mmx3mm TQFN
package and ISL97694A is offered in the 20 Ld 3mmx4mm
TQFN package. All parts operate in ambient temperature
range of -40°C to +85°C.
Features
? 2.4V Minimum Input Voltage, No Need for Higher Voltage
Supplies
? 4 Channels, up to 40mA Each (ISL97692) or 6 Channels, up
to 30mA Each (ISL97693/4A)
? 90% Efficient at 6P5S, 3.7V and 20mA (ISL97693/4A)
? Low 0.8mA Quiescent Current
? PWM Dimming Control with Internally Generated Clock
- 8-bit Resolution with Adjustable Dimming Frequency up to
30kHz (ISL97692/4A)
- 12-bit Resolution with Adjustable Dimming Frequency up
to 1.875kHz (ISL97694A)
- Optional Automatic Channel Phase Shift (ISL97692/4A)
- Linear Dimming from 0.025%~100% up to 5kHz or
0.4%~100% up to 30kHz (ISL97692/4A)
? Direct PWM Dimming with 0.005% Minimum Duty Cycle at
100Hz
? ±2.5% Output Current Matching
? Adjustable Switching Frequency from 400kHz to 1.5MHz
Applications
? Tablet, Notebook PC and Smart Phone Displays LED
Backlighting
Related Literature
? AN1733 “ISL97694AIRT-EVZ Evaluation Board User Guide”
? AN1734 “ISL97693AIRT-EVZ Evaluation Board User Guide”
? AN1735 “ISL97692 Evaluation Board User Guide” Coming
Soon
VIN: 2.4V~5.5V
L1
D1
VOUT: 24.5V, 6 x 20mA
10
10
4.7μF
10μH
4.7μF 4.7μF
1
VIN
1μF
LX
100pF 470k
15nF
12k
COMP
ISL97694A
OVP
2.2nF
23.7k
0.1
ISET
53k
AGND
SDA/PWMI
PGND
0.01
f PWM : 200Hz
SCL
EN
CH1
CH2
0.001
f PWM : 100Hz
CH3
291k
143k
FPWM
FSW
CH4
CH5
CH6
0.0001
0.001
0.01 0.1 1
INPUT DIMMING DUTY CYCLE (%)
10
FIGURE 1. ISL97694A TYPICAL APPLICATION DIAGRAM
FIGURE 2. ULTRA LOW PWM DIMMING LINEARITY
December 20, 2012
FN7839.4
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas Inc. 2012. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
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相关代理商/技术参数
ISL97694AIRTZ 制造商:Intersil Corporation 功能描述:6 CH W/12-BIT PWM DIMMING SINGLE CELL LI-ION BATTERY POWERED - Rail/Tube 制造商:Intersil Corporation 功能描述:IC LED DRVR BACKLIGHT 20TQFN
ISL97694AIRTZ-T 制造商:Intersil Corporation 功能描述:6 CH W/12-BIT PWM DIMMING SINGLE CELL LI-ION BATTERY POWERED - Tape and Reel 制造商:Intersil Corporation 功能描述:IC LED DRVR BACKLIGHT 20TQFN
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ISL97698IIZ-T 制造商:Intersil Corporation 功能描述:HIGH EFFICIENCY 2 STRING LED DRIVER FOR SMARTPHONESWLCSP 12 - Tape and Reel 制造商:Intersil Corporation 功能描述:IC LED DRVR BACKLIGHT 12WLCSP
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ISL97701IRZ-T7 功能描述:IC REG BOOST ADJ 0.1A 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:1 系列:EZBuck™ 类型:降压（降压） 输出类型:可调式 输出数:1 输出电压:0.8 V ~ 22.1 V 输入电压:3 V ~ 26 V PWM 型:电流模式 频率 - 开关:1.5MHz 电流 - 输出:1.8A 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WFDFN 裸露焊盘 包装:剪切带 (CT) 供应商设备封装:8-DFN（2x2） 其它名称:785-1276-1
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