The ISL97635 is a digitally controlled LED driver that controls 8 channels of LED current for LCD backlight applications. The ISL97635 is capable of driving typically 72 (8x9) pieces of 3.5V/30mA or 80 (8x10) pieces of 3.2V/20mA LEDs. The ISL97635’s 8 channels of voltage controlled current sources with typical currents matching of ±1%, which compensate for the non-uniformity effect of forward voltages variance in the LED stacks. To minimize the voltage headroom and power loss in the typical multi-strings operation, the ISL97635 features a dynamic headroom control that monitors the highest LED forward voltage string and uses its feedback signal for output regulation.
The LED dimming control can be achieved through a SMBus, an external PWM, or a variable DC (analog light sensor) input. SMBus controlled dimming allows 256 levels each of PWM and DC current adjustments. The SMBus PWM dimming frequency can be adjusted from 100Hz to 5kHz by an external capacitor. External PWM input allows up to 20kHz audio noise free PWM dimming. The SMBus PWM setting and an external PWMI signal can also be combined to provide a dynamic PWM dimming that complies with Intel’s DPST (Display Power Saving Technology) requirement.
One or more channels can be selected sequentially in any order, allowing scrolling in RGB LED backlighting applications.
The ISL97635 features extensive protection functions that include string open and short-circuit detections, OVP, OTP, thermal shutdown, and an optional input overcurrent protection with master fault disconnect switch. The fault conditions will be recorded in the Fault/Status register. There are selectable short-circuit thresholds and the switching frequency can be programmed between 600kHz and 1.2MHz.
Available in the 24 Ld 4mmx4mm QFN, the ISL97635 operates from -40°C to +85°C with input voltage ranging from 6V to 24V.
Manufacturer: Renesas Electronics America Inc.
Win Source Part Number: 809522-ISL97635IRZ
Packaging: Tube
Type: DC DC Regulator
Mounting Style: SMD
Applications: Backlight
Voltage - Output: 34.5V
Frequency: 600kHz, 1.2MHz
Current - Output / Channel: 35mA
Internal Switch(s): Yes
Topology: Step-Up (Boost)
Number of Outputs: 8
Dimming: PWM
Voltage - Supply (Min): 6V
Supplier Device Package: 24-QFN-EP (4x4)
Temperature Range - Operating: -40°C ~ 85°C
Manufacturer Package: 24-VFQFN Exposed Pad
Popularity: Medium
Fake Threat In the Open Market: 45 pct.
Supply and Demand Status: Limited
Manufacturer Pack Quantity: 75
MSL Level: 3 (168 Hours)
Voltage - Supply (Maximum): 24V
Part Number Series: ISL97635
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| Renesas Electronics Corporation | Win Source Electronics | DigiKey | Newark, An Avnet Company | Shenzhen Shengyu Electronics Technology Limited | Lingto Electronic Limited | |
|---|---|---|---|---|---|---|
| Product Category | LED Drivers | LED Drivers | LED Drivers | LED Drivers | LED Drivers | LED Drivers |
| Product Number | ISL97635IRZ | 809522-ISL97635IRZ | ISL97635IRZ-ND | 96M3146 | ISL97635IRZ | ISL97635IRZ |
| Product Name | SMBus 8-Channel LED Driver | PMIC - PMIC - LED Drivers - ISL97635IRZ | LED Drivers | Ic,laser Diode/led Driver,llcc,24Pin,plastic Rohs Compliant Renesas | Integrated Circuits (ICs) - Power Management (PMIC) - LED Drivers | PMIC - LED Drivers |
| Form Factor | Intgrated Circuit (IC) | Intgrated Circuit (IC) | Intgrated Circuit (IC) | Intgrated Circuit (IC) | ||
| Input Voltage | 6 to 24 volts | 6 to 24 volts | 6 to 24 volts | |||
| Output Voltage | 34.5 volts | 34.5 volts | 34.5 volts | |||
| Output Current | 35 milliamps | 35 milliamps | 35 milliamps | |||
| Efficiency | 91 % |
