LM2715MTX-ADJ NSC [National Semiconductor], LM2715MTX-ADJ Datasheet
LM2715MTX-ADJ
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LM2715MTX-ADJ Summary of contents
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LM2715 TFT Panel Module General Description The LM2715 is a compact bias solution for TFT displays. It has a current mode PWM step-up DC/DC converter with a 1.3A, 0.18Ω internal switch. Capable of generating 8V at 240mA from a Lithium ...
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Connection Diagram Pin Description Pin Name 1 Vcom+ 2 Vcom− 3 Vcom 4 AGND 5 Delay PGND SWI 12 SWO 13 SWC GMA 16 ...
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... Ordering Information Order Number Package Type LM2715MT-ADJ LM2715MTX-ADJ PGND(Pin 8):Connect all power ground components to a PGND plane which should also connect directly to this pin. Use a trace or via to connect the AGND plane to the PGND plane. Please see Layout Considerations under the Opera- tion section for more details on layout suggestions ...
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Block Diagrams www.national.com 20058451 20058457 4 20058403 ...
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Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications Voltage FB Voltage V Voltage C SWC Voltage Supply Voltage Amplifier/Buffer Input Voltage Amplifier/Buffer ...
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Electrical Characteristics Specifications in standard type face are for T ture Range ( T = −40˚C to +125˚C). Unless otherwise specified 1nF. GAMMA Vcom Amplifier Symbol Parameter V Input Offset Voltage (Note ...
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Electrical Characteristics Specifications in standard type face are for T ture Range ( T = −40˚C to +125˚C). Unless otherwise specified 1nF. GAMMA Gamma Buffer Symbol Parameter Is+ Supply Current (Amplifier + Buffer) I Output Short ...
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Typical Performance Characteristics Efficiency vs. Load Current (V = 8V) OUT Frequency vs. V Power Switch Current Limit vs. V www.national.com 20058426 Power Switch Current Limit vs. Temperature IN 20058425 IN 20058422 8 Efficiency vs. Load Current (V = 10V) ...
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Typical Performance Characteristics I vs (not switching) Feedback Current vs. Temperature PMOS R vs. SWI Voltage DSON (Continued) 20058421 20058463 SWI Current vs. SWI Voltage 20058466 (switching) 20058429 Delay Current vs. ...
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Typical Performance Characteristics SWI Current vs. SWI Voltage (PMOS OFF) Load Transient Response V = 10V 2.5V OUT IN 1) Load, 100mA to 300mA to 100mA 500mA/div 200mV/div, AC ...
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Typical Performance Characteristics Internal Soft Start and PMOS Delay 2.5V 32Ω OUT IN LOAD C = 100nF 10k\1.5k, SWI = 30V, SWC = 2V/div, DC ...
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Typical Performance Characteristics Input Bias Current vs. Common Mode Voltage (Gamma) Output Voltage vs. Output Current (Vcom or Gamma, sourcing) Large Signal Step Response www.national.com (Continued) Output Voltage vs. Output Current (Vcom or Gamma, sinking) 20058479 Supply Current vs. Common ...
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Typical Performance Characteristics Positive Slew Rate vs. Capacitive Load (Vcom or Gamma) Unity Gain Frequency vs. Capacitive Load (Vcom) PSRR vs. Frequency (Vcom) (Continued) Phase Margin vs. Capacitive Load 20058485 CMRR vs. Frequency 20058493 20058489 13 (Vcom) 20058492 (Vcom) 20058488 ...
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Operation (a) First Cycle of Operation (b) Second Cycle Of Operation CONTINUOUS CONDUCTION MODE The LM2715 is a TFT Panel Module containing a current- mode, PWM boost regulator. A boost regulator steps the input voltage higher output ...
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Operation (Continued) INTRODUCTION TO COMPENSATION FIGURE 2. (a) Inductor current. (b) Diode current. The LM2715 contains a current mode PWM boost converter. The signal flow of this control scheme has two feedback loops, one that senses switch current and one ...
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Operation (Continued) exceed the switch current limit. Using Schottky diodes with lower forward voltage drop will decrease power dissipation and increase efficiency. DC GAIN AND OPEN-LOOP GAIN Since the control stage of the converter forms a complete feedback loop with ...
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Operation (Continued) HIGH OUTPUT CAPACITOR ESR COMPENSATION When using an output capacitor with a high ESR value, or just to improve the overall phase margin of the control loop, another pole may be introduced to cancel the zero created by ...
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Operation (Continued) www.national.com FIGURE 3. Multi-Layer Layout 20058453 FIGURE 4. Single Layer Layout 18 20058452 ...
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Application Information FIGURE 5. Li-Ion to 10V TFT Application FIGURE 6. Li-Ion to 12V TFT Application 19 20058472 20058491 www.national.com ...
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Physical Dimensions LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. ...