Package Information
| CAD Model: | View CAD Model |
| Pkg. Type: | TQFN |
| Pkg. Code: | LAX |
| Lead Count (#): | 28 |
| Pkg. Dimensions (mm): | 5.00 x 5.00 x 0.75 |
| Pitch (mm): | 0.5 |
Environmental & Export Classifications
| Moisture Sensitivity Level (MSL) | 3 |
| Pb (Lead) Free | Yes |
| ECCN (US) | EAR99 |
| HTS (US) | 8542.39.0090 |
| RoHS (ISL97686IRTZ-T) | Download |
Product Attributes
| Lead Count (#) | 28 |
| Carrier Type | Reel |
| Moisture Sensitivity Level (MSL) | 3 |
| Pitch (mm) | 0.5 |
| Pkg. Dimensions (mm) | 5.0 x 5.0 x 0.75 |
| Pb (Lead) Free | Yes |
| Pb Free Category | Pb-Free 100% Matte Tin Plate w/Anneal-e3 |
| Temp. Range (°C) | -40 to +105°C |
| Backlight for LCD Size (inches) | 29 - 29 |
| Brightness Control | PWM or LED DC current control |
| Channels (#) | 4 |
| Fault Switch | Yes |
| Frequency Range (MHz) | 0.2 - 1.2 |
| IQ (Max) (μA) | 5 |
| IS (mA) | 5.5 |
| ISW (Typical) (mA) | 3400 |
| Input Voltage (Max) (V) | 32 |
| Input Voltage (Min) (V) | 9 |
| Input Voltage Range (V) | 9 - 32 |
| Integrated Diode | Yes |
| Interface | SPI |
| LEDs (#) | 4 |
| Length (mm) | 5 |
| MOQ | 6000 |
| Output Current Max/Channel (mA) | 160 |
| Output Voltage (Max) (V) | 75 |
| Over Voltage Protection | Yes |
| Parametric Category | Backlight LED Drivers |
| Peak Efficiency (%) | 90 |
| Pkg. Type | TQFN |
| Qualification Level | Standard |
| Thickness (mm) | 0.75 |
| Topology [Rail 1] | Inductor Boost |
| Total Current for DC/DC Lighting (mA) | 700 |
| Width (mm) | 5 |
Resources for ISL97686
Description
The ISL97686 is a PWM controlled LED driver that supports 4 channels of LED current, for Monitor and TV LCD backlight applications. It is capable of driving 160mA per channel from a 9V to 32V input supply, with current sources rated up to 75V absolute maximum. The ISL97686’s current sources achieve typical current matching to ±1%, while dynamically maintaining the minimum required VOUT necessary for regulation. This adaptive scheme compensates for the non-uniformity of forward voltage variance in the LED strings. The ISL97686 dimming can be controlled by a high speed SPI interface for independent channel control for dynamic dimming function synthesized on chip at 10-bit resolution. The ISL97686 has an advanced dynamic headroom control function, which monitors the highest LED forward voltage string, and regulates the output to the correct level to minimize power loss. This proprietary regulation scheme also allows for extremely linear PWM dimming from 0. 02% to 100%. The LED current can also be switched between two current levels, giving support for 3D applications. The ISL97686 incorporates extensive protections of string open and short circuit detections, OVP, and OTP.