MP24875DN-LF-Z

MP24875DN-LF-Z Datasheet

The MP24875 is a fixed frequency step-down switching regulator to deliver a constant current of up to 1.5A to high power LEDs. It integrates a high-side, high voltage power MOSFET. The wide 4.5V to 55V input range accommodates a variety of step-down applications, making it ideal for automotive, industry and general lighting applications. Peak current mode control and 200mV reference are applied for fast loop response, easy compensation and accurate LED current regulation. The switching frequency is programmable with an external resistor up to 200kHz, which can prevent EMI Electromagnetic Interference noise problems. The thermal shut down provides reliable, fault tolerant operations. A 12µA quiescent current in shutdown mode allows its use in battery-powered applications.

Part	Datasheet
MP24875DN-LF-Z	MP24875DN-LF-Z (pdf)

Related Parts	Information
MP24875DN-LF	MP24875DN-LF

PDF Datasheet Preview
The Future of Analog IC Technology The MP24875 is a fixed frequency step-down switching regulator to deliver a constant current of up to 1.5A to high power LEDs. It integrates a high-side, high voltage power MOSFET. The wide 4.5V to 55V input range accommodates a variety of step-down applications, making it ideal for automotive, industry and general lighting applications. Peak current mode control and 200mV reference are applied for fast loop response, easy compensation and accurate LED current regulation. The switching frequency is programmable with an external resistor up to 200kHz, which can prevent EMI Electromagnetic Interference noise problems. The thermal shut down provides reliable, fault tolerant operations. A 12µA quiescent current in shutdown mode allows its use in battery-powered applications. The MP24875 is available in SOIC8 with exposed pad package. MP24875 200kHz, 55V Input, 1.5A High Power LED Driver • Wide 4.5V to 55V Operating Input Range • Internal Power MOSFET • Up to 200kHz Programmable Switching Frequency • 130µA Quiescent Current • Ceramic Capacitor Stable • Internal Soft-Start • Up to Efficiency • 200mV reference voltage for high efficiency • Available SOIC8 with Exposed Pad Package • High Power LED Driver • Automotive, and General Lighting • Constant Source “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. CCOM2 RCOM CCOM1 COMP CONTROL RFREQ CFREQ LEDRFB MP24875 FREQ CBST D1 L1 COUT VIN 8V to 55V LED+ EFFICIENCY % Efficiency vs. Input Voltage 90 30 35 40 45 50 55 60 INPUT VOLTAGE V 9/21/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2010 MPS. All Rights Reserved. MP24875 1.5A, 200kHz, 55V HIGH-POWER LEDS DRIVER Part Number* MP24875DN ORDERING INFORMATION Package SOIC8E Top Marking MP24875DN Free Air Temperature TA to +85°C *For Tape & Reel, add suffix eg. MP24875 For RoHS compliant packaging, add suffix eg. MP24875 PACKAGE REFERENCE TOP VIEW SW 1 EN 2 COMP 3 FB 4 EXPOSED PAD ON BACKSIDE CONNECT TO GND SOIC8E 8 BST 7 VIN 6 FREQ 5 GND ABSOLUTE MAXIMUM RATINGS 1 Supply Voltage VIN ......................-0.3V to +60V Switch Voltage VSW ............. -0.5V to VIN + 0.5V BST to SW to +5V All Other Pins ..................................-0.3V to +5V Continuous Power Dissipation TA = +25°C 2 Junction Temperature ...............................150°C Lead Temperature Storage Temperature............... -65°C to +150°C Recommended Operating Conditions 3 Supply Voltage VIN ...........................4.5V to 55V Operating Junc to +125°C Thermal Resistance 4 SOIC8 Exposed Pad 50 °C/W Notes 1 Exceeding these ratings may damage the device. 2 The maximum allowable power dissipation is a function of the maximum junction temperature TJ MAX , the junction-toambient thermal resistance and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD MAX = TJ MAX TA / Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3 The device is not guaranteed to function outside of its operating conditions. 4 Measured on JESD51-7, 4-layer PCB. 9/21/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2010 MPS. All Rights Reserved. MP24875 1.5A, 200kHz, 55V HIGH-POWER LEDS DRIVER ELECTRICAL CHARACTERISTICS VIN = 12V, VEN = 2.5V, VCOMP = 1.4V, TA= +25°C, unless otherwise noted. Specifications over temperature are guaranteed by design and characterization. Parameter Symbol Condition Min Typ Max Units Feedback Voltage Upper Switch On Resistance 5 Upper Switch Leakage Current Limit Error Amp Voltage Gain Error Amp Transconductance Error Amp Min Source current Error Amp Min Sink current VIN UVLO Threshold VIN UVLO Hysteresis Soft-Start Time 5 Oscillator Frequency Minimum Switch On Time 5 Shutdown Supply Current Quiescent Supply Current Thermal Shutdown Minimum Off Time 5 Minimum On Time 5 EN Up Threshold EN Threshold Hysteresis VFB RDS ON 4.5V < VIN < 55V VBST VSW = 5V VEN = 0V, VSW = 0V AVEA GEA ICOMP = ±3µA VFB = 175mV VFB = 225mV VIN rising 20mV < VFB < 190mV RFREQ = VEN < 0.3V No load, VFB = 240mV Hysteresis = 20°C 188 200 212 mV µA/V 150 200 250 kHz 12 25 µA

PDF Datasheet Preview

The Future of Analog IC Technology

The MP24875 is a fixed frequency step-down switching regulator to deliver a constant current of up to 1.5A to high power LEDs. It integrates a high-side, high voltage power MOSFET. The wide 4.5V to 55V input range accommodates a variety of step-down applications, making it ideal for automotive, industry and general lighting applications. Peak current mode control and 200mV reference are applied for fast loop response, easy compensation and accurate LED current regulation. The switching frequency is programmable with an external resistor up to 200kHz, which can prevent EMI Electromagnetic Interference noise problems. The thermal shut down provides reliable, fault tolerant operations. A 12µA quiescent current in shutdown mode allows its use in battery-powered applications.

The MP24875 is available in SOIC8 with exposed pad package.

MP24875
200kHz, 55V Input, 1.5A High Power LED Driver
• Wide 4.5V to 55V Operating Input Range
• Internal Power MOSFET
• Up to 200kHz Programmable Switching

Frequency
• 130µA Quiescent Current
• Ceramic Capacitor Stable
• Internal Soft-Start
• Up to Efficiency
• 200mV reference voltage for high efficiency
• Available SOIC8 with Exposed Pad

Package
• High Power LED Driver
• Automotive, and General Lighting
• Constant Source
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc.

CCOM2

RCOM CCOM1

COMP

CONTROL

RFREQ

CFREQ LEDRFB

MP24875

FREQ

CBST D1

L1 COUT

VIN 8V to 55V

LED+

EFFICIENCY %

Efficiency vs. Input Voltage
90 30
35 40 45 50 55 60

INPUT VOLTAGE V
9/21/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2010 MPS. All Rights Reserved.

MP24875 1.5A, 200kHz, 55V HIGH-POWER LEDS DRIVER

Part Number* MP24875DN
ORDERING INFORMATION

Package SOIC8E

Top Marking MP24875DN

Free Air Temperature TA to +85°C
*For Tape & Reel, add suffix eg. MP24875 For RoHS compliant packaging, add suffix eg. MP24875

PACKAGE REFERENCE

TOP VIEW

SW 1 EN 2 COMP 3 FB 4

EXPOSED PAD ON BACKSIDE CONNECT TO GND

SOIC8E
8 BST 7 VIN 6 FREQ 5 GND

ABSOLUTE MAXIMUM RATINGS 1

Supply Voltage VIN ......................-0.3V to +60V Switch Voltage VSW ............. -0.5V to VIN + 0.5V BST to SW to +5V All Other Pins ..................................-0.3V to +5V Continuous Power Dissipation TA = +25°C 2 Junction Temperature ...............................150°C Lead Temperature Storage Temperature............... -65°C to +150°C

Recommended Operating Conditions 3

Supply Voltage VIN ...........................4.5V to 55V Operating Junc to +125°C

Thermal Resistance 4

SOIC8 Exposed Pad 50 °C/W

Notes 1 Exceeding these ratings may damage the device. 2 The maximum allowable power dissipation is a function of the
maximum junction temperature TJ MAX , the junction-toambient thermal resistance and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD MAX = TJ MAX TA / Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3 The device is not guaranteed to function outside of its operating conditions. 4 Measured on JESD51-7, 4-layer PCB.
9/21/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2010 MPS. All Rights Reserved.

MP24875 1.5A, 200kHz, 55V HIGH-POWER LEDS DRIVER

ELECTRICAL CHARACTERISTICS

VIN = 12V, VEN = 2.5V, VCOMP = 1.4V, TA= +25°C, unless otherwise noted. Specifications over temperature are guaranteed by design and characterization.

Parameter

Symbol Condition

Min Typ Max Units

Feedback Voltage Upper Switch On Resistance 5 Upper Switch Leakage Current Limit Error Amp Voltage Gain Error Amp Transconductance Error Amp Min Source current Error Amp Min Sink current VIN UVLO Threshold VIN UVLO Hysteresis Soft-Start Time 5 Oscillator Frequency Minimum Switch On Time 5 Shutdown Supply Current Quiescent Supply Current

Thermal Shutdown Minimum Off Time 5 Minimum On Time 5 EN Up Threshold EN Threshold Hysteresis

VFB RDS ON
4.5V < VIN < 55V VBST VSW = 5V VEN = 0V, VSW = 0V

AVEA GEA

ICOMP = ±3µA VFB = 175mV VFB = 225mV VIN rising
20mV < VFB < 190mV

RFREQ =

VEN < 0.3V No load, VFB = 240mV Hysteresis = 20°C
188 200 212 mV
µA/V
150 200 250 kHz
12 25 µA

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Datasheet ID: MP24875DN-LF-Z 650021