ISL97675 Intersil Corporation, ISL97675 Datasheet - Page 3

• Manufacturer Part Number: ISL97675
• Description: 4-Channel LED Driver
• Manufacturer: Intersil Corporation

Pin Configuration
Pin Descriptions
RFPWM/DirectPWM
FSW/PhaseShift
PIN NAME
VDDIO
AGND
PGND
ISET
OVP
FB4
FB3
FB2
FB1
SW
EN
NC
PIN NO.
5, 10
8, 9
11
12
13
14
15
16
1
2
3
4
6
7
3
FSW/PhaseShift
(I = Input, O = Output, S = Supply)
TYPE
O
S
S
S
I
I
I
I
I
I
I
I
I
I
VDDIO
ISET
Decouple with capacitor for internally generated supply rail.
Enable
FSW = 0 ~ 0.25 * VDDIO, Boost Switching Frequency = 600kHz with phase shift.
FSW = 0.25 * VDDIO ~ 0.5 * VDDIO, Boost Switching Frequency = 600kHz without
phase shift.
FSW = 0.5 * VDDIO ~ 0.75 * VDDIO, Boost Switching Frequency = 1.2MHz without
phase shift.
FSW = 0.75 * VDDIO ~ VDDIO, Boost Switching Frequency = 1.2MHz with phase
shift.
Resistor connection for setting LED current, (see Equation 3 for calculating the
I
No Connect.
Input 4 to current source, FB, and monitoring.
Input 3 to current source, FB, and monitoring.
Analog Ground for precision circuits.
Input 2 to current source, FB, and monitoring.
Input 1 to current source, FB, and monitoring.
External PWM dimming with frequency modulation or Direct PWM dimming without
frequency modulation.
When this pin is not biased and a resistor is connected to ground, the dimming
frequency will be set by the Setting Resistor.
When this pin is floating, the part enters Direct PWM mode such that the dimming
follows the input PWM signal without frequency modulation.
Overvoltage protection input.
Power ground (LX Power return).
Input to boost switch.
EN
NC
LED
peak).
1
2
3
4
5
20
6
ISL97675
(20 LD QFN)
19
ISL97675
4mmx4mm
TOP VIEW
ISL97675
7
18
8
17
9
16
10
15
14
13
12
11
DESCRIPTION
PGND
OVP
RFPWM/DirectPWM
FB1
FB2
www.DataSheet4U.com
May 19, 2010
FN7630.0