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.
IC LED DRVR RGLTR PWM 35MA 24QFN Product overview: ISL97635IRZ-TK from Renesas Electronics Corporation is a LED Driver IC for LED lighting, display backlights, indicator control, automotive lighting, signage, and regulated current drive circuits. It is useful for engineers and buyers comparing datasheets, replacement parts, BOM lines, package options, lifecycle status, and procurement availability. Key searchable attributes include 35MA. Search-friendly keywords include LED driver IC, constant current, lighting control, display backlight, 35MA, External/Internal LED Drivers. This listing supports clearer product discovery for industrial, commercial, repair, automation, power, sensing, and embedded system projects. Product number 137-ISL97635IRZ-TK can be used for catalog matching and distributor lookup.
LED Driver IC 8 Output DC DC Regulator Step-Up (Boost) PWM Dimming 35mA 24-QFN (4x4)
Manufacturer: Intersil
Win Source Part Number: 777494-ISL97635IRZ-T
Packaging: Reel package
Type: DC DC Regulator
Operating Temperature Range: -40°C ~ 85°C (TA)
Package: 24-VFQFN Exposed Pad
Applications: Backlight
Mounting: SMD
Voltage - Output: 34.5V
Frequency: 600kHz, 1.2MHz
Internal Switch(s): Yes
Topology: Step-Up (Boost)
Number of Outputs: 8
Dimming: PWM
Family Name: ISL97635
Categories: Integrated Circuits (ICs)
Manufacturer Package: 24-QFN-EP (4x4)
Voltage Supply MAX: 24V
Output Current per Channel: 35mA
Voltage Supply MIN: 6V
Alternative Parts (Cross-Reference): RT8561AGQW; TPS61185RGE; RT8561DGQW; ISL97635IRZ;
Introduction Date: October 06, 2007
ECCN: EAR99
Country of Origin: Malaysia
Estimated EOL Date: 2025
Halogen Free: Compliant
Popularity: Medium
Fake Threat In the Open Market: 36 pct.
Supply and Demand Status: Limited
IC LED DRVR RGLTR PWM 35MA 24QFN
IC LED DRVR RGLTR DIM 35MA 24QFN
IC,Laser Diode/LED Driver,LLCC,24PIN,PL
| Renesas Electronics Corporation | ERSAELECTRONICS PTE. LTD. | DigiKey | Win Source Electronics | Shenzhen Shengyu Electronics Technology Limited | Lingto Electronic Limited | Newark, An Avnet Company | |
|---|---|---|---|---|---|---|---|
| Product Category | LED Drivers | LED Drivers | LED Drivers | LED Drivers | LED Drivers | LED Drivers | LED Drivers |
| Product Number | ISL97635IRZ-TK | 137-ISL97635IRZ-TK | ISL97635IRZ-TK-ND | 777494-ISL97635IRZ-TK | ISL97635IRZ-TK | ISL97635IRZ-TK | 96M3148 |
| Product Name | SMBus 8-Channel LED Driver | 35MA LED Driver IC | LED Drivers | Board Mount LED Drivers - ISL97635IRZ-TK | Integrated Circuits (ICs) - Power Management (PMIC) - LED Drivers | PMIC - LED Drivers | Ic,laser Diode/led Driver,llcc,24Pin,plastic Rohs Compliant Renesas |
| 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 | 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 % |
