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IS32LT3120 Datasheet(PDF) 1 Page - Integrated Silicon Solution, Inc |
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IS32LT3120 Datasheet(HTML) 1 Page - Integrated Silicon Solution, Inc |
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1 / 14 page  IS32LT3120 Integrated Silicon Solution, Inc. – www.issi.com Rev.0A, 08/15/2014 1 DUAL CHANNEL, LINEAR LED DRIVER WITH FADE IN/FADE OUT Preliminary Information August 2014 GENERAL DESCRIPTION The IS32LT3120 is a linear programmable current regulator consisting of 2 output channels capable of up to 200mA each. Each channel features an ON/OFF input pin to toggle the channel between the OFF condition and the source condition. A single external resistor programs the current level for both of the channels, while a separate, single resistor programs the fade in and fade out rate for both channels. The device integrates a 63 steps fade in and fade out algorithm (Gamma correction) which causes the output LED current to gradually ramp up to the full source value after the channel’s control pin is pulsed. The same controller causes the LED current to gradually ramp down to zero if the channel’s input control pin is pulsed while the output channel is on. The LED current output can be controlled by a momentary contact switch or logic level signal. The IS32LT3120 is targeted at the automotive market with end applications to include map and dome lighting as well as exterior accent lighting. For 12V automotive applications the low dropout driver can support 1 to 3 LEDs per channel. It is offered in a small thermally enhanced SOP-8-EP packages. FEATURES Dual output channels can source up to 200mA each Independent on/off control for each channel -Inputs are debounced Programmable current via a single external resistor Programmable fade in, fade out via external resistor - Pull down resistor value sets fade speed - Gamma corrected fade in/out algorithm Fault Protection: - LED string shorted to GND - Over temperature SOP-8-EP packages Automotive Grade - AEC-Q100 (pending) Operating temperature range from -40°C ~ +125°C APPLICATIONS Automotive Interior: - Map light - Dome lighting - Puddle lamp in doors - Glove box - Vanity mirror TYPICAL APPLICATION CIRCUIT Figure 1 Typical Application Circuit |
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