ISL97632IRT14Z-TK Intersil, ISL97632IRT14Z-TK Datasheet

IC LED DRIVR WHITE BCKLGT 8-TDFN

ISL97632IRT14Z-TK

Manufacturer Part Number
ISL97632IRT14Z-TK
Description
IC LED DRIVR WHITE BCKLGT 8-TDFN
Manufacturer
Intersil
Type
Backlight, White LEDr
Datasheet

Specifications of ISL97632IRT14Z-TK

Topology
PWM, Step-Up (Boost)
Number Of Outputs
1
Internal Driver
Yes
Type - Primary
Automotive, Backlight
Type - Secondary
White LED
Frequency
1.3MHz ~ 1.6MHz
Voltage - Supply
2.4 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
8-TDFN Exposed Pad
Operating Temperature
-40°C ~ 85°C
Current - Output / Channel
70mA
Internal Switch(s)
Yes
Efficiency
86%
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
LED Driver with 1-Wire Dimming
The ISL97632 represents an efficient and highly integrated
PWM boost LED driver that is suitable for 1.8” to 3.5” LCDs
that employ 2 to 7 white LEDs for backlighting. With
integrated Schottky diode, OVP, and dynamic digital
dimming capability, the ISL97632 provides a simple, reliable,
and flexible solution to the backlight designers.
The ISL97632 features a simple 1-Wire digital interface that
provides a 5-bit dimming control. The dimming signal adjusts
the FB voltage and therefore the LED brightness in a DC
manner in 32 linear steps. An EN pin can be used to provide
a zero brightness setting or shutdown power saving function.
The ISL97632 is available in the 8 Ld TDFN (2mmx3mm)
package. There are 14V, 18V, and 26V OVP options that are
suitable for 3, 4, and 7 LEDs (3.5V/20mA type) backlight
applications respectively. The ISL97632 is specified for
operation over the -40°C to +85°C ambient temperature at
input voltage from 2.4V to 5.5V.
Pinout
Typical Application Circuit
VIN
VIN
EN
SDIN
GND
SDIN
GND
VIN
EN
1
2
3
4
10µH OR 22µH
(8 LD 2x3 TDFN)
TOP VIEW
ISL97632
FBSW
®
VOUT
FB
LX
1
Data Sheet
8
7
6
5
LX
VOUT
FBSW
FB
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• 1-Wire 5-Bit Digital Dimming
• Drives Up to 7 LEDs in Series (3.5V/20mA type)
• OVP (14V, 18V and 26V for 3, 4, and 7 LEDs applications)
• Integrated Schottky Diode
• 2.4V to 5.5V input
• 86% Efficiency
• 1.4MHz Switching Frequency Allows Small LC
• Enable for Shutdown Function or Zero Brightness Setting
• 1µA Shutdown Current
• Internally Compensated
• 8 Ld TDFN (2mmx3mm)
• Pb-Free (RoHS Compliant)
Applications
• LED backlighting for
Ordering Information
ISL97632IRT14ZT*
ISL97632IRT14ZTK* ELB
ISL97632IRT18ZT*
ISL97632IRT18ZTK* ELC
ISL97632IRT26ZT*
ISL97632IRT26ZTK* ELD
* Please refer to TB347 for details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ special
Pb-free material sets, molding compounds/die attach materials, and
100% matte tin plate plus anneal (e3 termination finish, which is RoHS
compliant and compatible with both SnPb and Pb-free soldering
operations). Intersil Pb-free products are MSL classified at Pb-free peak
reflow temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
- Cell phones
- Smartphones
- MP3
- PMP
- Automotive Navigation Panel
- Portable GPS
PART NUMBER
March 22, 2010
(Note)
All other trademarks mentioned are the property of their respective owners.
|
Copyright Intersil Americas Inc. 2006-2008, 2010. All Rights Reserved
Intersil (and design) is a registered trademark of Intersil Americas Inc.
ELB
ELC
ELD
MARKING
PART
-40 to +85 8 Ld 2x3 TDFN L8.2x3A
-40 to +85 8 Ld 2x3 TDFN L8.2x3A
-40 to +85 8 Ld 2x3 TDFN L8.2x3A
-40 to +85 8 Ld 2x3 TDFN L8.2x3A
-40 to +85 8 Ld 2x3 TDFN L8.2x3A
-40 to +85 8 Ld 2x3 TDFN L8.2x3A
RANGE
TEMP
(°C)
ISL97632
Tape and Reel
PACKAGE
(Pb-Free)
FN9239.3
DWG.
PKG.
NO.

Related parts for ISL97632IRT14Z-TK

ISL97632IRT14Z-TK Summary of contents

Page 1

... Ordering Information FBSW PART NUMBER (Note) ISL97632IRT14ZT* ISL97632IRT14ZTK* ELB ISL97632IRT18ZT* ISL97632IRT18ZTK* ELC ISL97632IRT26ZT* ISL97632IRT26ZTK* ELD * Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations) ...

Page 2

... CONDITION EN = 3V, enabled, not switching EN = 0V, disabled ILX = 100mA VLX = 28V Serial interface setting = 15 (center) Serial interface setting = 0,1 ..31) Serial interface setting = 0 VFB = 95mV IDIODE = 100mA +25°C A ISL97632IRT14Z ISL97632IRT18Z ISL97632IRT26Z SDIN = low SDIN = low SDIN = low SDIN = high θ θ (°C/ ...

Page 3

Block Diagram V (2.4V TO 5.5V) IN CIN V IN 1.4MHZ OSCILLATOR AND RAMP GENERATOR PWM COMPARATOR GM AMP COMPENSATION SDIN Pin Descriptions PIN PIN NUMBER NAME 1 GND 2 VIN SDIN FBSW 7 ...

Page 4

... The interface uses a normally high connection for use with open-drain driving schemes and Intersil’s proprietary 1-Wire XSD bus. When held low for between 15µs and 45µs, the interface registers a logic 1. When held low for between 90µ ...

Page 5

Typical Performace Curves 90 4. LEDs OUT (15µ 3. LEDs OUT (10µ 3. LEDs OUT (15µH) 4. LEDs OUT (10µ LEDs OUT (22µH) 60 ...

Page 6

... Overvoltage Protection The ISL97632 comes with overvoltage protection. The OVP trip points are at 14V, 18V, and 26V for ISL97632IRT14Z, ISL97632IRT18Z, and ISL97632IRT26Z respectively. The maximum numbers of LEDs and OVP threshold are shown in Table 1. When the device reaches the OVP, the LX stops switching, disabling ...

Page 7

Applications Efficiency Improvement Figure 2 on page 5 shows the efficiency measurements. The choice of the inductor has a significant impact on the power efficiency. As shown in Equation 4, the higher the inductance, the lower the peak current therefore ...

Page 8

SEPIC Operation For applications where the output voltage is not always above the input voltage, a buck or boost regulation is needed. A SEPIC (Single Ended Primary Inductance Converter) topology, (see Figure 10), can be considered for such an application. ...

Page 9

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use ...

Related keywords