ISL97635AIRZ Intersil, ISL97635AIRZ Datasheet - Page 10

• Manufacturer Part Number: ISL97635AIRZ
• Description: IC LED DRVR WHT/RGB BCKLGT 24QFN
• Manufacturer: Intersil
• Type: Backlight, White LED, RGBr

Specifications of ISL97635AIRZ

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 6
• Internal Driver: Yes
• Type - Primary: Automotive, Backlight
• Type - Secondary: RGB, White LED
• Frequency: 600kHz, 1.2MHz
• Voltage - Supply: 6 V ~ 24 V
• Voltage - Output: 34.5V
• Mounting Type: Surface Mount
• Package / Case: 24-VQFN
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 35mA
• Internal Switch(s): Yes
• Efficiency: 91%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pinout
Pin Descriptions
17, 18
19, 20
PIN
7, 8
10
12
13
14
15
16
21
22
23
24
11
1
2
3
4
5
6
9
PWMI/EN
SMBCLK
SMBDAT
PWMO
FPWM
NAME
FAULT
COMP
PGND
RSET
GND
OVP
VDC
IIN5
IIN4
IIN3
IIN2
IIN1
IIN0
VIN
NC
LX
(I = Input, O = Output, S = Supply)
10
TYPE
I/O
I/O
O
O
S
S
S
S
I
I
I
-
I
I
I
I
I
I
I
I
I
PWMI buffered output. If one connects a capacitor between PWMO and GND, it forms a lowpass filter
Dual Functions: Enable Pin and PWM brightness control pin or DPST control input. DO NOT let
Resistor connection for setting LED current, (see Equation 1 for calculating the ILEDmax)
Overvoltage protection input
Power ground (LX Power return)
Boost compensation pin
SMBus serial clock input
SMBus serial data input and output
Connect a capacitor between FPWM and GND to set the DPWM frequency. FPWM = 5.4µ/C
If SMBus PWM or DPST mode is used, connect C
connect C
connect C
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.
Analog GND and LED power return
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.
No Connect. Can be floating or grounded
Input 5 to current source, FB, and monitoring
Input 4 to current source, FB, and monitoring
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
Input to boost switch
Fault disconnect switch
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
PWMI/EN
SMBCLK
SMBDAT
PWMO
FPWM
GND
PWMO
FPWM
1
2
3
4
5
6
24
to set the dimming frequency and apply a 0.21V to 1.21V at V
7
between V
ISL97635A
23
8
(24 LD QFN)
ISL97635A
TOP VIEW
22
9
PWMO
21
10
and GND pins for DPST operation. If DC-to-PWM mode is used,
11
20
12
19
DESCRIPTION
18
17
16
15
14
13
PGND
PGND
OVP
IIN0
IIN1
IIN2
FPWM
to GND to set the dimming frequency. Also,
PWMO
.
December 22, 2008
FPWM
FN6564.2