EL7801

Supply Voltage, V_IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18V
Input Voltage . . . . . . . . . . . . . . . . . . . .  GND -0.3V to V_SP +0.3V
Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . 1A
Battery Input, V_BAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24V
Storage Temperature Range . . . . . . . . . . . . . .-65°C to +150°C
Ambient Operating Temperature . . . . . . . . . . . .-40°C to +85°C
Operating Junction Temperature . . . . . . . . . . . . . . . . . .  +125°C
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . .. See Curves

CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

The EL7801 is a high-power LED backlight driver with an integrated 36V FET designed to drive up to 8 high-power LEDs in series while running from a 12V input supply. The PWM converter runs from an internally generated 1MHz clock. With efficiencies over 90% the regulator provides tight control of LED current and may be configured in either boost or buck topologies, allowing from 1 to 8 series diodes to be driven from a 12V input.

EL7801 LED light level may be controlled either by:
1. LED DC bias current set via the LEVEL pin, or
2. External low frequency PWM control via the ENABLE/PWM pin.

In both control modes optional over temperature thermal protection of the LED reduces the LED DC bias current above a customer set temperature, protecting the LED from thermal damage. An optional fault monitor drives an external FET between the input supply and inductor, providing short circuit current protection for the LED and inductor as well as load dump protection for automotive applications. For low cost applications the pass transistor may be omitted and the fault pin bypassed.

The EL7801 is packaged in a 20 Ld QFN package and is specified for operation over the -40°C to +85°C temperature
range.