MAX25601AATJ/VY+ by Analog Devices

Synchronous Boost and Synchronous Buck LED Controllers

Status: Active
Series: MAX25601A
RoHS: Unknown
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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. Both controllers have high- and low-side gate drivers with at least 1A peak source and sink-current capability. Adaptive non-overlap control logic prevents shoot-through currents during transition. Both the boost and the buck faults are monitored on the active-low FLT pin. The MAX25601A/C is available in a 32-pin SWTQFN package and the MAX25601B/D is available in a 28-pin TSSOP package. The 32-pin package features an additional switch control that can be used in high-beam/low-beam and heads-up display applications.

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Features

Integration Minimizes BOM for High-Brightness LED Driver, Saving Space and Cost Wide Input-Voltage Range from 4.5V to 40V Wide Boost-Output Range up to 65V Programmable Switching Frequency Optimizes Component Size External MOSFETs Can be Sized for Appropriate Current Synchronous Rectification Provides High Efficiency and Fast Transient Response Average Current-Mode Control for Buck Eliminates Compensation Components
Wide Input-Voltage Range from 4.5V to 40V
Wide Boost-Output Range up to 65V
Programmable Switching Frequency Optimizes Component Size
External MOSFETs Can be Sized for Appropriate Current
Synchronous Rectification Provides High Efficiency and Fast Transient Response
Average Current-Mode Control for Buck Eliminates Compensation Components
Wide Dimming Ratio Allows High Contrast Ratio Analog Dimming and PWM Dimming Analog Voltage-Controlled PWM Dimming
Analog Dimming and PWM Dimming
Analog Voltage-Controlled PWM Dimming
Protection Features and Wide Temperature Range Increase System Reliability Short Circuit, Overvoltage, and Thermal Protection -40°C to +125°C Operating Temperature Range
Short Circuit, Overvoltage, and Thermal Protection
-40°C to +125°C Operating Temperature Range

Specifications

VIN (V) (min) 4.5
VIN (V) (max) 40
Max. No. of LEDs 15
# LED Channels 1
Regulation Topology Inductor Based
LED Configuration Series
ILED per Channel (A) (max) 30
PWM Dimming Freq. (kHz) (max) 2
Dimming Control AnalogAnalog Controlled PWMPWM
VCURR_SENSE (mV) 200
POUT (W) 100
LED String Volt. (V) (max) 60
Switching Frequency (kHz) 1001000
Package/Pins TQFN-CU/32
BudgetaryPrice (See Notes) 3.01

Last 6 months Inventory & Pricing History

MAX25601AATJ/VY+ LED Driver ICs by Analog Devices

LED DRIVER, SYNC BUCK-BOOST, 1MHZ/2.2MHZ

LED Lighting Components
> LED Driver ICs
> DC / DC LED Driver ICs
Status: Unknown
Series: -
RoHS: Compliant
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

RoHS Compliant YES

Last 6 months Inventory & Pricing History

Alternative Descriptions

Led Driver, Sync Buck-Boost, 1Mhz/2.2Mhz Rohs Compliant: Yes |Maxim Integrated/analog Devices MAX25601AATJ/VY+ | Newark Electronics

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This part has not been flagged as RoHS Compliant.

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