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
● Integration Minimizes BOM for High-Brightness LED
The MAX25601A/B/C/D is a synchronous boost control-
ler 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.
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
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 pro-
vided to enable a smooth power up of the boost output.
Protection features like hiccup mode, overvoltage protec-
tion, and thermal shutdown are provided.
● Wide Dimming Ratio Allows High Contrast Ratio
• Analog Dimming and PWM Dimming
• Analog Voltage-Controlled PWM Dimming
● Protection Features and Wide Temperature Range
Increase System Reliability
3
The synchronous buck LED controller uses Maxim's F
• Short Circuit, Overvoltage, and Thermal Protection
• -40°C to +125°C Operating Temperature Range
Architecture, a proprietary average-current-mode control
scheme to regulate the inductor current at a constant
switching frequency without any control-loop compensa-
tion. 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.
Simplified Application Circuit
L
BOOST
BOOST
R
IN
INPUT
V
OUT
N1
C
IN
C
BOOST
INP
INN
DH1
INPUT AND BIAS
SYNC IN/OUT
Both controllers have high- and low-side gate drivers
with at least 1A peak source and sink-current capabil-
ity. Adaptive non-overlap control logic prevents shoot-
through currents during transition. Both the boost and the
buck faults are monitored on the FLT pin.
LX1
DL1
N2
BOOST
VOUT
FLTB, IOUTV
OUT, FB
MAX25601
N3
DH2
BUCK
VOUT
PWM, ANALOG
DIMMING
L
BUCK
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.
LX2
DL2
CSP
BUCK TON
SETTING
C
BUCK
N4
COMP
BUCK
C
COMP
R
CS_LED
V
OUT
R
COMP
CSN
Applications
SHUNT_DRV*
● Automotive Exterior Lighting: High-Beam/Low-Beam/
Signal/Position Lights, Daytime Running Lights
(DRLs), Matrix Light, Pixel Light, and Other Adaptive
Front-Light Assemblies
PWM_HUD
SHUNT_CTRL*
N5
* MAX25601A/C ONLY
● Commercial, Industrial, and Architectural Lighting
Ordering Information appears at end of data sheet.
19-100564; Rev 3; 1/20
5秒后页面跳转
解析光耦仿真器：升级光耦合器技术的必要性
英伟达新一代Blackwell GPU过热问题致交付延迟
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
