MP4653GY

MP4653 Real LIPS CC/CV Mode LLC TV LED Driver The Future of Analog IC Technology DESCRIPTION The MP4653 is a CC/CV mode LLC TV LED driver for LED backlighting, especially for large size TV LED backlighting. Powered by 9V to 30V input supplies, the MP4653 outputs two 180 degree phase shifted driving signals for the external power stages. Its enhanced 9V gate driver provides adequate driving capability and can directly drive the external MOSFETs through an external gate driving transformer. The MP4653 integrates a constant current control loop for the LED current regulation and also a constant voltage control loop for the DC bus voltage, which is used to generate system power supplies like 12V/5V with other DC/DC converters. The CC/CV control loop programs the operating frequency of the LLC power stage and thus regulates the LED current and also the bus voltage. The MP4653 incorporates both analog dimming and PWM dimming to the LED current. A driving signal is output to directly drive the dimming MOSFET, which helps to achieve fast and high contrast ratio PWM dimming. The PWM dimming signal is also used for the CC/CV mode control. At PWM on interval, the CC mode is effective and the LED current is regulated; at PWM off interval, the CV mode is effective and the DC bus voltage is regulated. The gate driving signal and thus the energy through the power stage are continuous at both the PWM on interval and the PWM off interval. This helps to eliminate the system audible noise at PWM dimming. The MP4653 features sufficient and smart protection to increase system reliability. It protects the fault condition at both the DC bus stage and the LED driver stage. The protection for the DC bus stage includes the over voltage protection and over current protection (short protection). MP4653 Rev 1.01 6/28/2012 The protection for the LED driver stage includes the open LED protection, short LED protection, over LED current protection and any point of LED string short to ground protection. Thermal protection is integrated in MP4653. The MP4653 is available in SOIC20 package. FEATURES               Secondary Side “Real LIPS” LLC Controller CC/CV Frequency Control Loop Audible Noise Elimination Continuous driving signal at PWM dimming and LED fault condition 9V to 30V Input Voltage Range Analog and PWM Dimming Input Under Voltage Lockout DC Bus Output Over Voltage Protection DC Bus Short Protection System Auto-recovery and Hiccup Timer LED Open, Short Protection LED Output Over Voltage, Over LED Current Protection Any Point of LED String Short to GND Protection Available in SOIC 20 Package APPLICATIONS     LCD TVs and Monitors Desktop LCD Flat Panel Displays Flat Panel Video Displays Street Lighting All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Products, Quality Assurance “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 1 MP4653—REAL LIPS CC/CV MODE LLC TV LED DRIVER TYPICAL APPLICATION CI 400 V GND VFB T1 MP4653 Rss RFSET VOCP VFB CVCOMP RVCOMP CICOMP RICOMP IFB RVFBH CVbus RSS_FSET Css Vbus T2 400V 1 2 3 SS FSET GND VOCP GL 4 VFB 5 6 7 GR VCC VCOMP PWMOUT ICOMP IFB VIN PWMIN Q1 RVFBL RVOCP 20 VOCP 19 CDRV 18 17 16 15 CVCC Q2 PWMOUT CIN ROVPH Cr Co OVP . . . ROVPL 14 400 V GND OCP 8 SSD 9 OVP 10 A- Dim A- Dim 13 VLED4 VLED1 VLED3 VLED2 12 11 MP MN ROCP PWMOUT IFB Rsense OCP PWM Vbus VIN PWMOUT MP4653 Rev 1.01 6/28/2012 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 2 MP4653—REAL LIPS CC/CV MODE LLC TV LED DRIVER ORDERING INFORMATION Part Number* MP4653GY Package SOIC20 Top Marking MP4653 * For Tape & Reel, add suffix –Z (eg. MP4653GY–Z); PACKAGE REFERENCE MP4653 1 2 3 SS FSET GND VOCP GL 4 VFB 5 6 7 10 VCC VCOMP PWMOUT ICOMP IFB 8 SSD 9 GR VIN PWMIN 20 19 18 17 16 15 14 A- Dim 13 VLED4 VLED1 VLED3 VLED2 12 11 ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance Supply Voltage Vin.........................-0.3V to +38V GL,GR,VCC, PWMOUT ....................... -0.5V to 10.7V SSD, VOCP ...................................-6.5V to + 4V Other pins .......................................-0.5V to +7V Junction Temperature ...............................150C (2) Continuous Power Dissipation (TA = +25°C) ............................................................ 1.7 W Storage Temperature............... -65C to +150C Operating frequency .............................. 300kHz SOIC20 .................................. 72 ...... 30... C/W Recommended Operating Conditions (3) Supply Voltage Vin.........................-0.3V to +30V operating frequency ................ 20kHz to 250kHz Operating Junction Temp ....... -40C to +125C MP4653 Rev 1.01 6/28/2012 (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 TJ (MAX), the junction-toambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD (MAX) = (TJ (MAX)-TA)/θJA. 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. www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 3 MP4653—REAL LIPS CC/CV MODE LLC TV LED DRIVER ELECTRICAL CHARACTERISTICS VIN = 12V, TA = +25C, unless otherwise noted. Parameter Symbol Gate driver GL, GR Gate Pull-Down Gate Pull-Up Output Source Current Output Sink Current Dead time Gate Driver Supply Voltage (VCC) Voltage RGD RGU ISOURCE ISINK tdead VVCC Current IVCC Vin UVLO threshold VTH_UVLO_VIN VCC UVLO Hysteresis VTH_VIN_HYST Brightness Dimming Control Range Analog Dimming Full Scale VA-dim PWM Logic Input Threshold VTH-PWM PWM Logic Input Hysteresis VTH-PWM-Hyst Supply Current Supply Current IIN Operating Frequency Minimum Frequency Set Voltage VFSET SS pin voltage Vss Condition Typ 600 2 7.5 1 [5] 2 [5] 750 Igate = 20mA Igate = 20mA With 1nF load With 1nF load IVCC=0mA IVCC=30mA 9 8.8 Max Units 900 Ω Ω A A ns 9.4 9.3 20 4.35 240 9.8 1.18 1.9 0.5 1.23 2.2 V V V 1.6 2.5 mA 0.95 1.45 1 1.49 1.05 1.53 V V 35.6 38.6 41.6 kHz 2.2 2.5 2.8 Fmin 9V 9.4 9.8 V 0.3 V VCC rising 4.2 Analog dimming PWM dimming PWM dimming 1.13 1.6 No driver output At normal operation RFSET=RSS_FSET=40kΩ, IFB=0.1V(ICOMP=2.2V), Minimum operating frequency Fmin_op PWMIN=high RFSET=RSS_FSET=40kΩ,, Maximum Operating Frequency Fmax_op IFB=0.21V(ICOMP=1V), PWMIN=high Output PWM Dimming Signal for LED (PWMOUT) Logic High Voltage VH-PWMOUT Normal Operation At Fault Condition, Logic Low Voltage VL-PWMOUT or PWMIN=0 Output PWM Source Current ISOURCE_PWMOUT 100pF on PWMOUT pin Output PWM Sink Current ISINK_PWMOUT 100pF on PWMOUT pin LED Current Feedback (IFB) Magnitude |VIFB| LED Short Threshold for VIFBS Immediate action LED short detection blanking time Tblank MP4653 Rev 1.01 6/28/2012 Min 50 4.5 5 100 V V mA V mV mA mA 0.192 0.2 0.208 V 540 600 660 mV 100 140 180 ns www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 4 MP4653—REAL LIPS CC/CV MODE LLC TV LED DRIVER ELECTRICAL CHARACTERISTICS (continued) VIN = 12V, TA = +25C, unless otherwise noted. Parameter Symbol Condition LED short threshold for slow VIFBSC action Delay time for slow action Tdelay_IFB 300mV1.1VIFB_REF ICOMP hysteresis for burst mode IFB threshold for burst mode VTH_burst_IFB IFB reset threshold for burst VTH_reset_burst_IFB mode Over Bus Voltage Protection (VFB) Over bus Voltage Protection VTH(OVP_VFB) Threshold Delay Time VFB>2.4V Short LED stage Detection (SSD) SSD Threshold VTH_SSD SSD Detection Delay Time TD_SSD SSD