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Cold Cathode Fluorescent Lamp (CCFL) Drivers INVERTER FOR CCFL ELECTRICAL Requirements ITEM Symbol Min. TYP. Max UNIT Remark Input Voltage INV_PWR 9 14.8 21 V DC Input Current I in - - 0.65 A H.V(open) Vs 1550 - - V rms Lamp Voltage VL - 650 - V rms IL 6.2 6.5 6.8 mA PWM=100% IL 3.0 3.3 3.6 mA PWM=30% ON 2.8 3.3 3.6 V Backlight on/off signal OFF 0 0.5 0.8 V Low level INV_PWM 3.0 3.3 3.6 V PWM signal INV_PWM 30 - 100 % PWM duty cycle PWM Frequency F 142 150 158 Hz Lamp Frequency F 45 55 65 KHz Lamp Current Dis off PWM Signal Design by Cary.Chen Cold Cathode Fluorescent Lamp (CCFL) Drivers CCFL Driver Product Selection Guide Part Number 灯 管 数 输 入 电 压 最 大 输 入 电 压 偏 置 供 电 电 压 参 考 电 压 静 态 静 止 电 流 uA 静 态 工 作 电 流 mA 评估板 封装 TSSOP20 TSSOP20F #:Integrated Power Switches #:Open Lamp Regulation #:Current and Voltage Feedback Control #:Logic Level Burst Mode Control #:Supports Open/Short Lamp Protection #:Soft Start #:Output is Short Circuit Protected #:Analog and Burst Mode Dimming TSSOP20F #:4.5V to 14V Power Input (VBatt)) #:Current Voltage Feedback Control #:Analog and Burst Mode Dimming SOIC28 TSSOP28 #:Fixed Operating Frequency #:Input Voltage Range of 10V to 32V #:Full-Wave Sense Amp #:Integrated Burst Mode Oscillator and Modulator #:Soft-On and Soft-Off Burst Envelope 6.0V MP1010B 1 TO 25 V NR* 16 V 4.5V TO 5.5V 5 10 2.5 EV0037 1.8 EV1026EF00A 22V MP1026 MP1038 1 UP TO 8 4.5V TO 14V 10V TO 32V 35 V NR* N/A 6 500 10 3 EV1038DM -03A 主要特性 Cold Cathode Fluorescent Lamp (CCFL) Drivers CCFL Drivers Features and Benefits Features Benefits Resonant Technology This technology ensures the lamp will strike at any temperature and in any environment. In addition no additional components are required for varying the frequency of the lamp. High Efficiency The full bridge technology allows near perfect sine waves for optimum efficiency which results in the maximum light output per watt. This also eliminates the need for high voltage ballast capacitors. Protection All of our devices provide integrated short circuit and open and short lamp protection. Small Form Factor All CCFL IC drivers integrate full bridge architecture using N-Channel MOSFETs, which reduces total solution part count. In addition MPS’ patented circuit architecture creates an efficient and low cost solution. Brightness Multiple Lamp Capacity Our Ics incorporate Analog and PWM dimming techniques, internal oscillators for burst mode and integrated soft-on and soft-off capabilities. MPS has a patented technique for matching lamp currents allowing 2% tolerances Cold Cathode Fluorescent Lamp (CCFL) Drivers CCFL Application Table Application Requirements MPS Products PDAs Digital Cameras Handheld Products Video Cameras GPS Systems Copiers High Efficiency Small Form Factor Low Profile Module 2.6 to 6 Volt Operation Up to 2 Watts MP1022A MP1025 Notebooks Web Pads / Tablets Picture Frames eBooks Portable DVD Players POS / ATM Terminals High Efficiency Small Form Factor 6 to 25 Volt Operation(MP1010B) 4.5 to 14V Volt Operation(MP1026) Low Cost Solution Up to 8 Watts MP1010B MP1026 Flat Panel LCD Monitors Automotive Entertainment High / Bright Displays (Daylight Readable) Lamp Matching Multiple Lamp Capability Thermal Management Up to 150 Watts MP1038 Cold Cathode Fluorescent Lamp (CCFL) Drivers MP1010B DESCRIPTION FEATURES The MP1010B is a power solution IC that offers #:Integrated Power Switches a true complete solution for driving a Cold #:6.0V to 22V Variable Supply Voltage with Cathode Fluorescent Lamps (CCFL). This Regulated Lamp Current. Power IC converts unregulated DC voltage to a #:Rated 12W Power Output at 12V Input nearly pure sine wave required to ignite and #:Open Lamp Regulation operate the CCFL. Based on proprietary power #:Current and Voltage Feedback Control topology and control techniques it greatly #:Logic Level Burst Mode Control increases the power conversion efficiency. #:Supports Open/Short Lamp Protection #:Soft-Start APPLICATIONS #:Short Circuit Protected Output #:LCD Backlight Inverter for Notebook Computers #:High Energy Start Pulse #:Web Pads, GPS, Desktop Displays, #:Analog and Burst Mode Dimming Portable DVD, Car Video Display Systems Cold Cathode Fluorescent Lamp (CCFL) Drivers MP1026 DESCRIPTION The MP1026 is a Power IC that offers a complete solution for driving a Cold Cathode FEATURES #:4.5V to 14V Power Input (VBatt) Fluorescent Lamp (CCFL). This Power IC #:Increase Transformer Reliability converts unregulated DC voltage to a nearly #:Open Lamp Timer and Regulation pure sine wave required to ignite and operate #:Current and Voltage Feedback Control the CCFL. #:Logic Level Burst Mode Control The MP1026 greatly increases power #:Supports Open/Short Lamp Protection conversion efficiency and supports both analog and burst mode dimming, simplifying the module #:Soft-Start implementation. The MP1026 offers the #:Outputs are Short Circuit Protected following distinct performance advantages: #:Allows Burst-Mode Operation #:More light for less power #:Improved Line Transient Response #:Small board implementation #:Tightened Lamp Current Accuracy #:Low RF emission #:Low external components cost The MP1026 is suitable for 2-Cell Li-Ion battery applications using 5V, 9V, or 12V adapters as the power source. Cold Cathode Fluorescent Lamp (CCFL) Drivers DESCRIPTION The MP1038 is a fixed operating frequency inverter MP1038 FEATURES controller that controls four external N-Channel power MOSFETs in a full-bridge configuration. The #:Controls Four External, Low Cost, N-Channel inverter is designed to power one or more cold MOSFETs cathode fluorescent lamps (CCFL) to backlight liquid crystal displays. Its full-bridge architecture #:Fixed Operating Frequency converts unregulated DC input voltages to the #:Input Voltage Range of 10V to 32V nearly pure sine waves required to ignite and #:Lamp Current and Voltage Regulation operate CCFL. For reliable lamp ignition, the operating frequency is #:Full-Wave Sense AmpE set by an external resistor and during startup, is #:Analog and Burst Mode Dimming Control temporarily swept toward the unloaded resonant frequency of the tank. The built-in burst oscillator #:Integrated Burst Mode Oscillator and Modulator can be synchronized with an external clock to #:Soft-On and Soft-Off Burst Envelope minimize display scan interference. Burst mode or #:Open Lamp Protection analog mode dimming is controlled with an external analog signal. Built-in fault management features #:Secondary Over-Current Protection include an open lamp regulator, a transformer #:Dual-mode, Fault Timer secondary peak current regulator, and a dual-mode fault timer. The secondary over-current timeout can be shortened with external components. Built-in current limits for the external switches protect against inadvertent shorts. The MP1038 is available in TSSOP28 and SOIC28 packages. #:Available in TSSOP28 and SOIC28 Packages