E910.28

Pinout




Specifications

• Wide input range of 5V to 60V
• Wide, adjustable output voltage of 1.25V to (Vin-0.5V)
• Output current range of 0mA to > 10A depending only on external PFET
• Supports optional external NFET as free wheeling diode
• Very high efficiency over load current range
• Very low shutdown current with internal supply off (20A typical)
• Low standby current with internal supply on for fast start up
  (<200A typical)
• 100% duty cycle possible
• Easy to use chaotic regulation behaviour
• Fast multi-loop-regulation
• Adaptive frequency selection up to 300kHz
• No compensation necessary
• External reference voltage input, for e.g. DAC control of Vout
• ON and Sleep control-input with TTL/CMOS threshold but accepting
  up to 60V
• Open load stable
• Temperature range  40C to + 125 C
• TSSOP24 package

Description

The E910.28 IC is developed and optimized for automotive applications where it can be used to supply controllers, sensors, Power-LEDs and many other devices. The reference input allows it to control the output voltage (or current) with e.g. an external DAC. That makes it easy to build LED-dimmer or any application that needs variable supply.

For fast load and line regulation a multi-loop regulation is implemented using a chaotic current mode regulator that even requires no compensation components. A duty cycle of 100% enables the minimum possible voltage drop and therefore the best utilization of components and input voltage range. Due to the external FETs any required power can be realised. The option to have an NFET as a free wheeling diode help increases the system efficiency. With the ON and SLP pins the converter can be started and stopped. Due to their wide input voltage range the pins can be driven with TTL- and CMOS-level as well as CAN-controller output or a (filtered) Kl15-signals.