FAN5640 Series

LED Driver, Dual High-side Constant Current Source

Catalog

LED Driver, Dual High-side Constant Current Source

Part	Voltage - Supply (Max) [Max]	Number of Outputs	Applications	Dimming	Package / Case	Mounting Type	Current - Output / Channel [custom]	Type	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Voltage - Supply (Min) [Min]	Internal Switch(s)
ON Semiconductor FAN5640S7X	20 V	2	Backlight	PWM	6-TSSOP SC-88 SOT-363	Surface Mount	25 mA	Linear	85 °C	-40 °C	SC-88 (SC-70-6)	6 V

Catalog

LED Driver, Dual High-side Constant Current Source

Key Features

• 20 V Maximum Driver Input Level

• Dual Output

• 25 mA Drive Capability per Channel

• Two Strings of 2-4 LEDs Each

• External Resistor Sets Maximum Current

• Fast Turn-On/Off Capability

• Low Bias Current

• Thermal Shutdown Protection

Description

The FAN5640 is designed to illuminate one or two strings of keypad LEDs with constant high-side current sources. The device can drive up to four white LEDs in series at a maximum current of 25 mA per channel. If the second channel is not needed, the channels can be tied together to boost output current up to 50 mA. An external resistor programs the maximum output current. Dimming can be accomplished by pulse width modulation of the enable pin or the input supply rail.