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| White LED Driver with PWM Dimming |
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Available in RoHS/Pb-Free
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 Buy direct from Intersil
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 Check distributor inventory
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 Request samples
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Part No. |
Design-In
Status |
Temp. |
Package |
MSL |
Price
US $ |
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| ISL97634IRT14Z-T |
Active |
Ind |
8 Ld TDFN T+R |
2 |
1.60 |
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| ISL97634IRT14Z-TK |
Active |
Ind |
8 Ld TDFN T+R |
2 |
1.60 |
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| ISL97634IRT18Z-T |
Active |
Ind |
8 Ld TDFN T+R |
2 |
1.60 |
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| ISL97634IRT18Z-TK |
Active |
Ind |
8 Ld TDFN T+R |
2 |
1.60 |
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| ISL97634IRT26Z-T |
Active |
Ind |
8 Ld TDFN T+R |
2 |
1.60 |
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| ISL97634IRT26Z-TK |
Active |
Ind |
8 Ld TDFN T+R |
2 |
1.60 |
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| The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice. |
| MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020 |
| SMD = Standard Microcircuit Drawing |
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 Description |
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The ISL97634 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 wide range of PWM dimming capability, the ISL97634 provides a simple, reliable, and flexible solution to the backlight designers.
The ISL97634 features a wide range of PWM dimming control capability. It allows dimming frequency as low as DC to 32kHz beyond audible spectrum. The ISL97634 also features a feedback disconnect switch to prevent the output from being modulated by the PWM dimming signal that minimizes system disturbance.
The ISL97634 is available in the 8 Ld TDFN (2mmx3mm) package. There are 14V, 18V, and 26V OVP options that are suitable for 3 LEDS, 4 LEDs, and 7 LEDs (3.5V/20mA type) backlight applications respectively. The ISL97634 is specified for operation over the -40°C to +85°C ambient temperature at input voltage from 2.4V to 5.5V. |
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 Key Features |
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Drives Up to 7 LEDs in Series (3.5V/20mA type)
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OVP (14V, 18V, and 26V for 3, 4 and 7 LEDs Applications)
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PWM Dimming Control From DC to 32kHz
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Output Disconnect Switch
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Integrated Schottky Diode
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2.4V to 5.5V Input
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85% Efficiency
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1.4MHz Switching Frequency Allows Small LC
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1μA Shutdown Current
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Internally Compensated
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8 Ld TDFN (2mmx3mm)
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Pb-Free (RoHS Compliant)
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| Related Documentation |
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 Datasheet(s): |
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 Evaluation Board(s): |
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 Technical Homepage: |
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 Parametric Data |
| | Topologies | | Inductor Boost | | | # of LEDs (max) | | 7 | | | # of Channels | | 1 | | | Digital Interface | | N | | | For LCD Size | | 1.8 to 3.5 | | | IOUT (max) (mA) | | 40 | | | Peak Efficiency (%) | | 85 | | | VIN (V) | | 2.7 to 5.5 | | | VOUT (max) (V) | | 27 | | | Frequency (MHz) | | 1.4 | | | IS (max) (mA) | | 1 | | | Iq (max) (μA) | | 1 | | | Isw (typ) (mA) | | 470 | | | Integrated Diode | | Y | | | OVP | | Y | | | Fault Switch | | Y | | | Brightness Control | | PWM up to 20kHz | |
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 Application Block Diagrams |
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| Applications |
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- LED Backlighting for:
- Cell phones
- Smartphones
- MP3
- PMP
- Automotive Navigation Panel
- Portable GPS
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