ISL97635A Ver la hoja de datos (PDF) - Intersil
Número de pieza
componentes Descripción
Fabricante
ISL97635A Datasheet PDF : 28 Pages
| |||
Pinout
ISL97635A
ISL97635A
(24 LD QFN)
TOP VIEW
24 23 22 21 20 19
SMBCLK 1
18 PGND
SMBDAT 2
17 PGND
FPWM 3
16 OVP
PWMO 4
15 IIN0
GND 5
14 IIN1
PWMI/EN 6
13 IIN2
7 8 9 10 11 12
Pin Descriptions (I = Input, O = Output, S = Supply)
PIN
NAME
TYPE
DESCRIPTION
1
SMBCLK
I
SMBus serial clock input
2
SMBDAT
I/O
SMBus serial data input and output
3
FPWM
I
Connect a capacitor between FPWM and GND to set the DPWM frequency. FPWM = 5.4µ/CFPWM
If SMBus PWM or DPST mode is used, connect CFPWM to GND to set the dimming frequency. Also,
connect CPWMO between VPWMO and GND pins for DPST operation. If DC-to-PWM mode is used,
connect CFPWM to set the dimming frequency and apply a 0.21V to 1.21V at VPWMO.
4
PWMO
I/O
PWMI buffered output. If one connects a capacitor between PWMO and GND, it forms a lowpass filter
with an internal 40kΩ resistor to filter the PWMI signal for DPST operation when Reg 0x01 = 0x01. If
one applies a 0.2V to 1.2V DC input voltage, the output will be PWM with duty cycle proportional to
the DC input.
5
GND
S
Analog GND and LED power return
6
PWMI/EN
I
Dual Functions: Enable Pin and PWM brightness control pin or DPST control input. DO NOT let
PWMI/EN floating. The device needs 4ms for initial power-up Enable, then this pin can be applied with
a PWM signal with off time no longer than 28ms.
7, 8
NC
-
No Connect. Can be floating or grounded
9
IIN5
I
Input 5 to current source, FB, and monitoring
10
IIN4
I
Input 4 to current source, FB, and monitoring
11
RSET
I
Resistor connection for setting LED current, (see Equation 1 for calculating the ILEDmax)
12
IIN3
I
Input 3 to current source, FB, and monitoring
13
IIN2
I
Input 2 to current source, FB, and monitoring
14
IIN1
I
Input 1 to current source, FB, and monitoring
15
IIN0
I
Input 0 to current source, FB, and monitoring
16
OVP
I
Overvoltage protection input
17, 18
PGND
S
Power ground (LX Power return)
19, 20
LX
I
Input to boost switch
21
FAULT
O
Fault disconnect switch
22
COMP
O
Boost compensation pin
23
VIN
S
Input voltage for the device and LED power
24
VDC
S
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
10
FN6564.2
December 22, 2008
Share Link: 