MAX1513ETP+T Maxim Integrated Products, MAX1513ETP+T Datasheet
MAX1513ETP+T
Specifications of MAX1513ETP+T
Related parts for MAX1513ETP+T
MAX1513ETP+T Summary of contents
Page 1
... Notebook Computer Displays LCD Monitors and TVs Automotive Displays Pin Configuration appears at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ♦ 2.7V to 5.5V Input Supply Range ♦ ...
Page 2
TFT-LCD Power-Supply Controllers ABSOLUTE MAXIMUM RATINGS FB, FBP, FBN, FBG, FBL, IN, CS+, SDFR to GND ...............................................-0.3V to +6V CS-, DEL, GATE, REF to GND .............................-0. SUPB to GND .........................................................-0.3V to +14V OUTB, FBPB to GND ..............................-0.3V to ...
Page 3
TFT-LCD Power-Supply Controllers ELECTRICAL CHARACTERISTICS (continued) = 10V, SDFR = IN, C (Circuit of Figure 3V SUPB otherwise noted.) PARAMETER SYMBOL FBP Effective Load-Regulation Error (Transconductance) FBP Line (IN)-Regulation Error DRVP Sink Current I DRVP ...
Page 4
TFT-LCD Power-Supply Controllers ELECTRICAL CHARACTERISTICS (continued) = 10V, SDFR = IN, C (Circuit of Figure 3V SUPB otherwise noted.) PARAMETER SYMBOL GATE-OFF LINEAR-REGULATOR CONTROLLER (REG N) FBN Regulation Voltage V FBN FBN Fault Trip Level ...
Page 5
TFT-LCD Power-Supply Controllers ELECTRICAL CHARACTERISTICS = 10V, SDFR = IN, C (Circuit of Figure 3V SUPB PARAMETER SYMBOL IN Supply Range IN Undervoltage-Lockout V UVLO Threshold IN Quiescent Current REF Output Voltage MAIN STEP-UP CONTROLLER ...
Page 6
TFT-LCD Power-Supply Controllers ELECTRICAL CHARACTERISTICS (continued) = 10V, SDFR = IN, C (Circuit of Figure 3V SUPB PARAMETER SYMBOL LOGIC LINEAR-REGULATOR CONTROLLER (REG L) FBL Regulation Voltage V FBL FBL Input Bias Current FBL Effective ...
Page 7
Figure 5V MAIN wise noted.) STEP-UP EFFICIENCY vs. LOAD CURRENT (1.5MHz) 100 100 200 ...
Page 8
TFT-LCD Power-Supply Controllers (Circuit of Figure 5V 15V MAIN wise noted.) BUFFER-AMPLIFIER LARGE-SIGNAL STEP RESPONSE MAX1513/14 toc10 1µs/div NAME PIN MAX1513 MAX1514 Internal Reference. Connect a 0.22µF ceramic capacitor from REF to the ...
Page 9
TFT-LCD Power-Supply Controllers NAME PIN MAX1513 MAX1514 REG N Base Drive. Open drain of an internal P-channel MOSFET. Connect to the base DRVN DRVN external NPN linear-regulator pass transistor. Logic Linear-Regulator (REG L) Base Drive. Open drain ...
Page 10
TFT-LCD Power-Supply Controllers V IN 4.5V TO 5.5V C1 22µF 6.3V R11 10Ω C10 1µF 0.47µF 2.2µF 680Ω LOGIC 3.3V/500mA 16.5kΩ 10µF R8 10.0kΩ LX 0.1µF D2 3.6kΩ 0.1µ GOFF -10V/30mA 102kΩ 0.47µF R4 ...
Page 11
TFT-LCD Power-Supply Controllers V IN 4.5V TO 5.5V C1 22µF 6.3V R11 10Ω C10 1µF 0.47µF 2.2µF 680Ω LOGIC 3.3V/500mA 16.5kΩ 10µF R8 10.0kΩ LX 0.1µF D2 3.6kΩ 0.1µ GOFF -10V/30mA 102kΩ R4 0.47µF ...
Page 12
TFT-LCD Power-Supply Controllers SDFR DEL V IN DRVL V LOGIC FBL V MAIN DRVG V GAMMA FBG SUPB FBPB OUTB TO VCOM MAX1513 ONLY Figure 3. MAX1513/MAX1514 Functional Diagram 12 ______________________________________________________________________________________ MAX1513 MAX1514 MAIN STEP-UP CONTROLLER WITH SOFT-START AND FAULT ...
Page 13
TFT-LCD Power-Supply Controllers Typical Operating Circuit The typical operating circuit of the MAX1513 (Figure complete power-supply system for TFT LCDs. The cir- cuit generates a +15V source-driver supply, +25V and -10V gate-driver supplies, a +3.3V logic supply ...
Page 14
TFT-LCD Power-Supply Controllers input PWM comparator, the flip-flop is reset and the MOSFET turns off. Since the inductor current is continu- ous, a transverse potential develops across the inductor that turns on the diode (D1). The voltage across the inductor ...
Page 15
TFT-LCD Power-Supply Controllers Logic Linear-Regulator Controller The logic linear-regulator controller (REG analog gain block with an open-drain N-channel output. It dri- ves an external PNP pass transistor with a 680Ω base- to-emitter resistor (Figure 1). Its guaranteed ...
Page 16
TFT-LCD Power-Supply Controllers Gamma Linear-Regulator Controller (MAX1513 Only) The gamma linear-regulator controller REG ana- log gain block with an open-drain N-channel output. It drives an external PNP pass transistor with a 1.5kΩ base-to-emitter resistor (Figure 1). Its ...
Page 17
TFT-LCD Power-Supply Controllers Each positive regulator (step-up regulator, REG P, REG L, and REG G) includes a 7-bit soft-start DAC whose input is the reference, and whose output is stepped in 128 steps from zero up to the reference voltage. ...
Page 18
TFT-LCD Power-Supply Controllers taken from an appropriate curve in the Typical Operating Characteristics, and an estimate of LIR based on the above paragraphs: 2 ⎛ ⎛ ⎞ MAIN = L ⎜ ⎜ ⎟ × ⎝ ⎠ ...
Page 19
TFT-LCD Power-Supply Controllers greater than 100mV, the current-feed- SENSE back signal is too high and can trip the current limit before the full load current is delivered. Use the cur- rent-sense configuration in Figure 9 to ...
Page 20
TFT-LCD Power-Supply Controllers GATE MAX1513 GND MAX1514 FB Figure 10. Lossless Current Sensing with × Ω ...
Page 21
TFT-LCD Power-Supply Controllers In the circuits of Figures 1 and 2, the maximum total voltage ripple is 1% (peak-to-peak) of the 15V output, which corresponds to 150mV peak-to-peak ripple. A conservative way to calculate the maximum ESR and minimum capacitance ...
Page 22
TFT-LCD Power-Supply Controllers The DC loop gain ( approximately × × 554 . R where R1 and R2 are the feedback-divider resistors (Figure ...
Page 23
TFT-LCD Power-Supply Controllers determines the frequency placement of the zero and pole. A typical value between 100pF and 10nF. When adding lead compensation, always check the loop stability by monitoring the transient response to a pulsed output ...
Page 24
TFT-LCD Power-Supply Controllers POSITIVE CHARGE-PUMP OUTPUT VOLTAGE vs 3-STAGE CHARGE-PUMP 2-STAGE CHARGE-PUMP 1-STAGE CHARGE-PUMP (V) MAIN Figure 13. Positive Charge-Pump ...
Page 25
TFT-LCD Power-Supply Controllers capacitors, the output voltage ripple is dominated by the capacitance value. Use the following equation to approximate the required capacitor value: I LOAD CP ≥ C OUT OSC RIPPLE CP where C ...
Page 26
TFT-LCD Power-Supply Controllers ⎡ ⎛ ⎛ ⎞ BIAS ≈ ⎟ × ⎢ ⎜ ⎜ ⎝ ⎠ ⎢ V ⎝ I ⎣ T LOAD LR where V is 26mV at room temperature and ...
Page 27
TFT-LCD Power-Supply Controllers PC Board Layout and Grounding Careful PC board layout is important for proper operation. Use the following guidelines for good PC board layout: 1) Minimize the area of high-current loops. The high- current input loop goes from ...
Page 28
... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 28 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...