Features  Constant current output value is not affected by the output load voltage  Wide constant current output range: 5~500mA  The current output value (5~500mA) can be adjusted using an external resistor  Low ICC current, only 500uA, helps improve lamp efficiency  Built-in over-temperature protection circuit (OTP)  Minimum output over-drive voltage: 0.35V@IOUT=350mA  Output withstand voltage up to 32V, can be used for 24V LED strip PWM dimming, and the maximum voltage for non-dimming LED strips can reach 48V  Current mismatch between chips <±5%@ IOUT=300mA Applications  Constant current LED module  Constant current LED strip  LED fluorescent tube  LED backlight

The INK1102 is an LED linear constant current driver chip that provides a single-channel constant current output. The current output range is 5~500mA, and the current value can be set via an external resistor (RFB). The output can withstand a maximum voltage of 32V. The chip's operating voltage range is 3.3~5.5V. With a current setting voltage as low as 0.3V and a 200mV low-dropout driver stage, the INK1102 provides stable current output over a wide drive voltage range, greatly enhancing the cascading capability of constant current light strip modules. The INK1102 has few external components and good application reliability. The chip includes a high-precision bandgap reference source, a 5.5V voltage regulator, an over-temperature protection circuit, and a low-dropout driver circuit. The chip also provides an output enable control pin DIM, which has an internal pull-up resistor. When the enable pin is not needed, it can be left floating, and the default output is constant current. Users can also use 5V logic to control the output current through this pin, achieving high-quality PWM dimming. For example, it can be used with the INK1003 as a high-power constant current driver. The INK1102 has a built-in temperature sensor and overheat protection function. The internal temperature sensor can detect the temperature status of the INK1102; when the internal temperature of the INK1102 chip exceeds 150℃, the over-temperature protection circuit will activate and shut off the constant current output. When the chip's junction temperature falls below 130°C, the constant current output will resume. The INK1102 uses a small SOT89-5 package, suitable for high-quality LED modules and strip applications. Its operating temperature range is -40~85°C.