Datasheet Maxim MAX25601A — 数据表

EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX25601A/MAX25601B/
MAX25601C/MAX25601D Synchronous Boost and
Synchronous Buck LED Controllers General Description Benefits and Features The MAX25601A/B/C/D is a synchronous boost controller followed by a synchronous buck LED controller. The
4.5V to 40V input voltage range of the boost controller is
ideal for automotive applications, and acts as a pre-boost
power supply for the second-stage buck LED controller.
The synchronous boost is a current-mode controller
that can be be paralleled with another device to provide
higher output power. A SYNCOUT pin provides the clock
to drive the RT/SYNCIN pin of the other device, enabling
two-phase 180-degree out-of-phase operation. The boost
converter can be programmed with a switching frequency
of 200kHz to 2.2MHz. Spread spectrum is included to
reduce EMI. An internal digital soft-start feature is provided to enable a smooth power up of the boost output.
Protection features like hiccup mode, overvoltage protection, and thermal shutdown are provided.
The synchronous buck LED controller uses Maxim's F3
Architecture, a proprietary average-current-mode control
scheme to regulate the inductor current at a constant
switching frequency without any control-loop compensation. Inductor current is sensed in the bottom synchronous
n-channel MOSFET. The device operates over a wide
4.5V to 65V input range at switching frequencies as high
as 1MHz. Both analog and PWM dimming are included.
LED current can be monitored on the IOUTV pin. …