MAX15004A/B/MAX15005A/B high-performance, current-mode PWM controllers operate at an automotive input voltage range from 4.5V to 40V (load dump). The input voltage can go down as low as 2.5V after startup if VCC is supplied by an external bias voltage. The controllers integrate all the building blocks necessary for implementing fixed-frequency isolated/noniso- lated power supplies. The general-purpose boost, flyback, forward, and SEPIC converters can be designed with ease around the MAX15004/MAX15005. The current-mode control architecture offers excellent line-transient response and cycle-by-cycle current limit while simplifying the frequency compensation. Programmable slope compensation simplifies the design further. A fast 60ns current-limit response time, low 300mV current-limit threshold makes the controllers suitable for high-efficiency, high-frequency DC-DC con- verters. The devices include an internal error amplifier and 1% accurate reference to facilitate the primary-side regulated, single-ended flyback converter or nonisolat- ed converters. An external resistor and capacitor network programs the switching frequency from 15kHz to 500kHz (1MHz for the MAX15005A/B). The MAX15004A/B/MAX15005A/B provide a SYNC input for synchronization to an external clock. The maximum FET-driver duty cycle for the MAX15004A/B is 50%. The maximum duty cycle can be set on the MAX15005A/B by selecting the right combi- nation of RT and CT. The input undervoltage l
The MAX15004 and MAX15005 are high‑performance current‑mode PWM controllers designed for automotive power‑supply applications. They support a wide input voltage range of 4.5 V to 40 V and integrate all necessary blocks for flyback, boost, forward, and SEPIC converters.
The devices offer programmable switching frequencies (15 kHz‑500 kHz for MAX15004, up to 1 MHz for MAX15005), a low 300 mV current‑limit threshold, and built‑in protection features such as over‑voltage, thermal shutdown, and UVLO. They are available in 16‑pin TSSOP‑EP packages and are AEC‑Q100 qualified for automotive use.
| Current‑Limit Threshold | Low 300 mV, 5 % accuracy |
|---|---|
| Thermal Shutdown Temperature | 160 °C |