
ISL97636
Pinout
ISL97636
(24 LD QFN)
TOP VIEW
GND
GND
FPWM
VLEVEL
GND
PWMI/EN
1
2
3
4
5
6
24
7
23
8
22
9
21
10
20
11
19
12
18
17
16
15
14
13
PGND
PGND
OVP
IIN0
IIN1
IIN2
Pin Descriptions (I = Input, O = Output, S = Supply)
PIN
1, 2
3
4
5
6
NAME
GND
FPWM
VLEVEL
GND
EN/PWMI
TYPE
S
-
-
S
I
DESCRIPTION
Analog GND
Not used. Leave floating and connect anything will have no effect on operation.
Not used. Leave floating and connect anything will have no effect on operation.
Analog GND and LED power return
Dual Functions: Enable Pin and PWM brightness control pin. DO NOT leave EN/PWMI floating. The device needs 40μs
for initial power-up Enable, then this pin can be applied with a PWM signal with off time no longer than 28ms.
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
IIN7
IIN6
IIN5
IIN4
RSET
IIN3
IIN2
IIN1
IIN0
OVP
PGND
PGND
LX
LX
FAULT
COMP
VIN
VDC
I
I
I
I
I
I
I
I
I
I
S
S
I
I
O
O
S
S
Input 7 to current source, FB, and monitoring
Input 6 to current source, FB, and monitoring
Input 5 to current source, FB, and monitoring
Input 4 to current source, FB, and monitoring
Resistor connection for setting LED current, (see Equation 1 for calculating the ILEDpeak)
Input 3 to current source, FB, and monitoring
Input 2 to current source, FB, and monitoring
Input 1 to current source, FB, and monitoring
Input 0 to current source, FB, and monitoring
Overvoltage protection input
Power ground (LX Power return)
Power ground (LX Power return)
Input to boost switch
Input to boost switch
Fault disconnect switch
Boost compensation pin
Input voltage for the device and LED power
De-couple capacitor for internally generated supply rail. If 2.7V < VBL+ < 5.5V, apply VDC directly with a supply voltage
of 2.7V to 5.5V
9
FN6570.0
May 9, 2008