DATASHEET
ISL97692, ISL97693, ISL97694A
Single or Multiple Cell Li-ion Battery Powered 4-Channel and 6-Channel
LED Drivers
FN7839
Rev.6.00
Sep 8, 2017
The ISL97692, ISL97693, ISL97694A are Intersil’s highly
Features
integrated 4- and 6-channel LED drivers for display
• 2.4V minimum input voltage, supports single cell applications
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.
• 4 channels, up to 40mA each (ISL97692) or 6 channels, up to
30mA each (ISL97693, ISL97694A)
• 90% efficient at 6P5S, 3.7V and 20mA (ISL97693, ISL97694A)
• Low 0.8mA quiescent current
The ISL97692 has four channels and provides 8-bit PWM
dimming with adjustable dimming frequency up to 30kHz. The
ISL97693 has six 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
• PWM dimming control with internally generated clock
- 8-bit resolution with adjustable dimming frequency up to
30kHz (ISL97692, ISL97694A)
- 12-bit resolution with adjustable dimming frequency up to
1.875kHz (ISL97694A)
2
30kHz, 7.5kHz, or 1.875kHz, respectively, controlled with I C
or PWM input.
The ISL97692 and ISL97694A feature phase shifting that may
be enabled optionally, providing an optimized phase delay
between channels. In the ISL97692 and ISL97694A, phase
shifting can multiply the effective dimming frequency by four
and six allowing above audio-band PWM dimming with 10-bit
dimming resolution.
- Optional automatic channel phase shift (ISL97692,
ISL97694A)
- Linear dimming from 0.025%~100% up to 5kHz or
0.4%~100% up to 30kHz (ISL97692, ISL97694A)
• Direct PWM dimming with 0.005% minimum duty cycle at
100Hz
The ISL97692, ISL97693, ISL97694A 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.
• ±2.5% output current matching
• Adjustable switching frequency from 400kHz to 1.5MHz
Applications
• Tablet, Notebook PC and Smart Phone Displays LED
Backlighting
The ISL97692, ISL97693, ISL97694A incorporate extensive
protection functions including string open and short circuit
detections, OVP, and OTP.
Related Literature
• For a full list of related documents, visit our website
- ISL97692, ISL97693, ISL97694A product pages
The ISL97692 and ISL97693 are offered in the 16 Ld 3x3mm
TQFN package, and a 16 bump 1.7x1.7mm WLCSP for the
ISL97692. The ISL97694A is offered in the 20 Ld 3x4mm TQFN
package. All parts operate in the ambient temperature range of
-40°C to +85°C.
L1
D1
VOUT: 24.5V, 6 x 20mA
VIN: 2.4V~5.5V
10
10µH
4.7µF 4.7µF
4.7µF
10
1
VIN
1µF
100pF 470k
LX
COMP
OVP
15nF
12k
23.7k
2.2nF
ISL97694A
0.1
0.01
ISET
53k
PGND
AGND
SDA/PWMI
SCL
CH1
CH2
CH3
CH4
CH5
CH6
f
: 200Hz
PWM
EN
0.001
f
: 100Hz
PWM
FPWM
FSW
291k
0.0001
0.001
0.01
0.1
1
10
143k
INPUT DIMMING DUTY CYCLE (%)
FIGURE 1. ISL97694A TYPICAL APPLICATION DIAGRAM
FIGURE 2. ULTRA LOW PWM DIMMING LINEARITY
FN7839 Rev.6.00
Sep 8, 2017
Page 1 of 32
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