MP4001 MPS | Alldatasheet
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Technical content
Universal Input High Brightness White LED Driver MP4001 Rev. 1.02 www.MonolithicPower.com 1 5/1/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved.
DESCRIPTION
The MP 4001 is a high efficiency step-down converter designed for drivin g the high brightness Light Emitting Diodes (LEDs). The MP 4001 drives external MOSFET with boundary conduction mode which features no reverse recovery loss in the freewheeling diode, soft turn on with zero-current and valley voltage for the power MOSFET. Such operation mode can achieve very high efficiency and in the same time minimize the inductor value and size. With the boundary conduction control mode, the LED current can be well regulated by control the MOSFET peak current which is sensed through an external resistor. Its low 300mV feedback voltage reduces power loss and improves the efficiency. The MP4001 integrate s a high-voltage smart LDO, which allows the AC input to power up the IC directly. The smart LDO sink s current when the input voltage is lower than 24V to achieve higher efficiency. The MP 4001 implements both PWM and DC input burst dimming The MP4001 features output short protections, maximum switching frequency limitation, under-voltage lockout and thermal shut down.
FEATURES
Constant-current LED Driver Universal AC Input (85VAC-305VAC) Power MOSFET Zero-Current Turn On High Efficiency Boundary Mode Operation Integrated High-voltage Smart LDO Low 1mA Operation Current PWM or DC Input Burst Dimming Control Hiccup Short Circuit Protection Maxim Frequency Limited to 110kHz Thermal Shutdown Available in SOIC8 Package
APPLICATIONS
Non-Isolated Lighting General Illumination Industrial Lighting Automotive/ Decorative LED Lighting LCD TV Backlighting DC/DC or AC/DC LED Driver Applications All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Products, Quality Assurance page. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION MP4001 Rsense AC input LEDs Cout D L GND CS DRIVE BOS VCC IN Cin MOSFET DIMDIM CBOS Vbus Vout -Vin Vsw
MP4001 – UNIVERSAL INPUT HIGH BRIGHTNESS WLED DRIVER MP4001 Rev. 1.02 www.MonolithicPower.com 2 5/1/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number* Package Top Marking MP4001DS SOIC8 MP4001 *For Tape & Reel, add suffix –Z (eg. MP4001DS-Z) For RoHS Compliant Packaging, add suffix –LF (eg. MP4001DS–LF–Z) PACKAGE REFERENCE ABSOLUTE MAXIMUM RATINGS (1) Continuous Power Dissipation (TA=25°C) (2) Recommended Operating Conditions (3) IN Supply 50/60Hz Thermal Resistance (4) θJA θJC Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature T J (MAX), the junction -to- ambient thermal resistance θ JA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by P D (MAX) = (TJ (MAX)- TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regula tor 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 approximately 1” square of 1 oz copper.
MP4001 – UNIVERSAL INPUT HIGH BRIGHTNESS WLED DRIVER MP4001 Rev. 1.02 www.MonolithicPower.com 3 5/1/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VIN =24VDC, no load on pin Drive, TA = +25C, unless otherwise noted. Parameters Symbol Condition Min Typ Max Units Input with An AC Voltage VINAC 50/60Hz AC RMS at Pin IN 9 350 V Input with A DC Voltage VINDC A DC voltage at Pin IN 9 450 V Input Supply Current (Quiescent) IINQS VDIM = 0V 0.64 mA Input Supply Current (Operation) IINRUN VDIM = 5 V 1 mA VCC Internal Regulated Voltage VCCH VIN=14-24V, VCC Peak Voltage 9.8 V VCCL VIN=14-24V, VCC Valley Voltage 8.9 V VCC VIN=10.5V or VIN=35V 8.5 V VCC Hysteresis VCCHYS 0.88 V VCC UVLO VCCUVLO 6.5 7.25 8 V VCC UVLO Hysteresis VCCUVLO_HYS 1 V DIM Input High VDIMH VDIM rising, VBOS=1.2V 1.5 V DIM Input Low VDIML VDIM falling, VBOS=1.2V 0.9 V DIM Pull up Current I DIM_PULL_UP VDIM=0V 10 A BOS Charge Current IBOS 3 4 5 A BOS High Threshold VBOSH BOS connect with a capacitor 2.1 2.42 2.6 V PWM Dimming on Propagation Delay TPWM_ON_PD PWM rising edge to Drive rising edge 540 ns PWM Dimming off Propagation Delay TPWM_OFF_PD PWM falling edge to Drive falling edge 3 µs CS Pin Reference Voltage VRS VDIM=VCC, @TA = -40°C to +85°C 270 300 330 mV Turn-off Propagation Delay tOFF_PD 100(4) ns Leading Edge Blanking Time tLEB 290 450 ns CS Bias Current ICS -1 1 A Gate Drive Source Current IDRV_SOURCE VDRV=0V 400(5) mA Gate Drive Sink Current IDRV_SINK VDRV=VCC -1.2(5) A Drive Low Level Output Voltage VDRVL IDRV=10mA 43 mV Drive High Level Output Voltage to Rail VDRVH IDRV=-10mA 110 mV Gate Minimal Turn-on Time tON_MIN 400(5) ns Maxim Switching Frequency fSW_MAX 110(5) kHz Over Temperature Protection Threshold TOTP 150 C Over Temperature Protection Threshold Hysteresis TOTP_HYS 30 C Output Short Shut Down Time tSD_SHORT When short circuit occurs 1.7 ms Notes: 5) Guarantee by design.
MP4001 – UNIVERSAL INPUT HIGH BRIGHTNESS WLED DRIVER MP4001 Rev 1.02 www.MonolithicPower.com 4 5/1/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. PIN FUNCTIONS Pin # Name Description 1 DRIVE External MOSFET drive output. The zero current crossing signal is detected from this pin. 2 CS LED current sense input. Connect the current sense resistor that programs the LED current.
3 BOS
Burst Oscillator Setting. For the DC input burst dimming, connect a capacitor from this pin to GND to program the burst dimming frequency. For the external PWM dimming , connect a resistor such as 300kΩ from this pin to GND and apply the logic signal to the DIM pin. 4 GND Ground.
5 DIM
Dimming Control Input. For DC input burst dimming control, the voltage of 0V to 2.42V at DIM pin linearly sets the burst -mode duty cycle from minimum to 100%. For exte rnal PWM dimming control, connect the PWM signal to DIM pin. Open DIM pin or pull it high if no dimming control is applied. 6 IN Input Supply Pin. By connecting the IN pin to AC input as power source of VCC. 7 VCC Internal regulated supply voltage outp ut. Must be locally bypassed. The VCC voltage provides the power for IC logic and driving external MOSFET. 8 VS Test pin. Connect to GND for normal operation.
MP4001 – UNIVERSAL INPUT HIGH BRIGHTNESS WLED DRIVER MP4001 Rev. 1.02 www.MonolithicPower.com 5 5/1/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS VIN =90-265VAC, VLED=10-30V, 3-9LEDS, ILED=350mA, TA = +25C, unless otherwise noted.
MP4001 – UNIVERSAL INPUT HIGH BRIGHTNESS WLED DRIVER MP4001 Rev. 1.02 www.MonolithicPower.com 6 5/1/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN =90-265VAC, VLED=10-30V, 3-9LEDS, ILED=350mA, TA = +25C, unless otherwise noted.
MP4001 – UNIVERSAL INPUT HIGH BRIGHTNESS WLED DRIVER MP4001 Rev. 1.02 www.MonolithicPower.com 7 5/1/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN =90-265VAC, VLED=10-30V, 3-9LEDS, ILED=350mA, TA = +25C, unless otherwise noted.
MP4001 – UNIVERSAL INPUT HIGH BRIGHTNESS WLED DRIVER MP4001 Rev. 1.02 www.MonolithicPower.com 8 5/1/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN =90-265VAC, VLED=10-30V, 3-9LEDS, ILED=350mA, TA = +25C, unless otherwise noted.
MP4001 – UNIVERSAL INPUT HIGH BRIGHTNESS WLED DRIVER MP4001 Rev. 1.02 www.MonolithicPower.com 9 5/1/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. FUNCTIONAL BLOCK DIAGRAM Control and Protection Circuit Thermal Protection UVLO Output Short Protection Max Off Time Control Max Frequency Control ZCD Circuit Drive DRIVE Filter and LEB Vref CS LDO IN GND VCC Burst Oscillator DIM BOS AC In Figure 1: Function Block Diagram.
MP4001 – UNIVERSAL INPUT HIGH BRIGHTNESS WLED DRIVER MP4001 Rev 1.02 www.MonolithicPower.com 12 5/1/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. A maximum 110kHz switching frequency is set by MP400 1 to a void extreme losses in the circuit and ensure better EMI performance. If the converter reaches the maximum frequency, it will operate in discontinuous current conduction mode. Such operation mode should be avoided since the LED current is out of regulation. In order to design the switching frequency fs within the 30 kHz to 110kHz range, inductor design is critical. bus out out s LED bus (V V ) V1L f 2 I V where, VBUS is the input voltage of the Buck converter, VOUT is the LED voltage. Hiccup Output Short Protection If the entire LED string is shorted, V OUT is zero. Due to the minimal on time limitation, the inductor current will be out of regulation. The MP4001 can detect such failure and shut down for about 1.7ms, and then re-tries the operation. Such hiccup protection can not only eliminate the thermal issue due to short circuit current, but also maintain normal operation if the protection is mis-triggered. Under-Voltage Lockout (UVLO) Protection Under-voltage lockout (UVLO) is implemented to protect the chip from operati ng at insufficient supply voltage. The UVLO rising threshold is about 7.25V while its falling threshold is a consistent 6.25V. Thermal Shut down Protection An accurate temperature protection is implemented to prevent the chip from operating at exceedingly high temperatures. When the silicon die temperature is higher than its upper threshold, it shuts down the whole chip. When the temperature is lower than its lower threshold, the chip is enabled again .
MP4001 – UNIVERSAL INPUT HIGH BRIGHTNESS WLED DRIVER MP4001 Rev 1.02 www.MonolithicPower.com 14 5/1/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. A B C D VAC Vbus Va 2Va VP 0.5VP Va Figure 11: Waveform of Valley Fill Circuit The valley fill circuit makes the interval that the circuit is powered by AC line extremely increased to make increase the power factor. Here choose two 22uF/250V capacitors and three 400V/1A diode to construct the valley fill circuit. Select the Inductor The MP4001 work in BCM, select a proper inductor value to ensure the operating frequency is at the design range: The maximum operating frequency for MP4001 is 110kHz, the frequency must set higher than 20kHz to avoid noise. bus _ max out _ min out _ min s _ max LED bus _ max (V V ) V1L f 2 I V bus _ min out _ max out _ max s _ min LED bus _ min (V V ) V1L f 2 I V Choose a 680uH inductor with the maximum operating frequency around 60kHz and minimum operating frequency around 20kHz. The saturated current of inductor must be greater than twice of LED current. Select Power MOSFET The voltage stress of MOS must be greater than the maximum input voltage (375V). The peak current through the MOSFET is the peak value of inductor current, which equals twice of LED current. The RMS current of MOS can be gotten from the following equation. out MOS_ RMS LED bus VI 2*I * 3*V Choose a MOSFET with 600V voltage rating and 2.4A current rating. Select Rectifying Diode The voltage stress of the rectifying diode must be greater than the maximum input voltage (375V). The average current of the rectifying diode can be calculated by following equation. out D _ AVG LED bus VI 2*I *(1 ) V Choose a n ultra-fast di ode with 600V voltage rating and 1A current rating. Select Current Sense Resistor The current sense resistor is selected by the following. CS LED 300mVR 2*I Use a 500mOhm and a 2.49Ohm resistor parallel as the current sense resistor. Select the Output Capacitor The output capacitor should be large enough to filter the output ripple current and so that the LED current ripple is in a desired range. For a ceramic output capacitor, its value should be: L _ PEAK OUT s _ min LED LED _ ripple _ pk _ pk IC 8f R I Where RLED is the dynamic resistor of LED load. LED LED LED VR I fs_min is the minimum operating frequency, which occurs at the minimum input voltage and maximum output voltage condition for this application. bus _ min LED _ max LED _ max s _ min L _ PEAK bus _ min (V V )*Vf L*I *V
MP4001 – UNIVERSAL INPUT HIGH BRIGHTNESS WLED DRIVER NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third party I ntellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP4001 Rev. 1.02 www.MonolithicPower.com 16 5/1/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved.
PACKAGE INFORMATION
0.016(0.41) 0.050(1.27)0o-8o DETAIL "A" 0.010(0.25) 0.020(0.50) x 45o SEE DETAIL "A" 0.0075(0.19) 0.0098(0.25) 0.150(3.80) 0.157(4.00)PIN 1 ID 0.050(1.27) BSC 0.013(0.33) 0.020(0.51) SEATING PLANE 0.004(0.10) 0.010(0.25) 0.189(4.80) 0.197(5.00) 0.053(1.35) 0.069(1.75) TOP VIEW FRONT VIEW 0.228(5.80) 0.244(6.20) SIDE VIEW 1 4 8 5 RECOMMENDED LAND PATTERN 0.213(5.40) 0.063(1.60) NOTE: 1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN BRACKET IS IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.004" INCHES MAX. 5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION AA. 6) DRAWING IS NOT TO SCALE. 0.010(0.25) BSC GAUGE PLANE