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1. 4MHz Thin Package Current-Mode Step-Up …

AIC1896. 1. 4 MHz thin Package Current-Mode Step-Up DC/DC Converter FEATURES DESCRIPTION. Fixed Frequency Current-Mode PWM AIC1896 is a Current-Mode pulse-width modulation Operation. (PWM), Step-Up DC/DC Converter. The built-in high Adjustable Output Voltage up to 30V. voltage N-channel MOSFET allows AIC1896 for Guaranteed 13V/ 200mA Output with 5V Input. Step-Up applications with up to 30V output voltage, to 10V Input Range. as well as for Single Ended Primary Inductance Maximum A Shutdown current . Converter (SEPIC) and other low-side switching Programmable Soft-Start.

AIC1896 1. 4MHz Thin Package Current-Mode Step-Up DC/DC Converter Analog Integrations Corporation Si-Soft Research Center DS …

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Transcription of 1. 4MHz Thin Package Current-Mode Step-Up …

1 AIC1896. 1. 4 MHz thin Package Current-Mode Step-Up DC/DC Converter FEATURES DESCRIPTION. Fixed Frequency Current-Mode PWM AIC1896 is a Current-Mode pulse-width modulation Operation. (PWM), Step-Up DC/DC Converter. The built-in high Adjustable Output Voltage up to 30V. voltage N-channel MOSFET allows AIC1896 for Guaranteed 13V/ 200mA Output with 5V Input. Step-Up applications with up to 30V output voltage, to 10V Input Range. as well as for Single Ended Primary Inductance Maximum A Shutdown current . Converter (SEPIC) and other low-side switching Programmable Soft-Start.

2 DC/DC converter. Tiny Inductor and Capacitors are allowed. Space-Saving SOT-23-6 and TSOT-23-6 The high switching frequency ( ) allows the Package . use of small external components. The Soft-Start function is programmable with an external capacitor, APPLICATIONS which sets the input current ramp rate. White LED Backlight. OLED Driver. The AIC1896 is available in a space-saving LCD Bias SOT-23-6 and TSOT-23-6 Package . TYPICAL APPLICATION CIRCUIT. L D1. VIN. or 86. CH521S-30 C3. C1 84. ZD1. F 1 F. BZV55-B12 82. ~ Efficiency (%). AIC1896 80. 6 1 78 VIN= IN LX.

3 4. SHDN FB. 3. 76 VIN= OFF ON R2. SS GND. 1K ILED 74. 5 2. R1 72. C2 62 L: GTSK-51-150M (15 H). 70 L: GTSK-51-100M (10 H). F. 68. 2 4 6 8 10 12 14 16 18 20. LED current (mA). Fig. 1 Li-Ion Powered Driver for three white LEDs Analog Integrations Corporation Si-Soft Research Center DS-1896G-01 121208. 3A1, , Li-Hsin Rd. I, Science Park, Hsinchu 300, Taiwan, TEL: 886-3-5772500 FAX: 886-3-5772510 1. AIC1896. L D1. VIN 80. or CH521S-30 C3 78. C1. ZD1 76. F 1 F. BZV55-B24. 74. Efficiency (%). ~ AIC1896 72. 6 1. 70 VIN= IN LX. OFF ON. 4. SHDN FB. 3. 68. VIN= R2.

4 SS GND ILED. 1K 66. 5 2. 64. R1 L: GTSK-51-150M (15 H). C2 62. 62 L: GTSK-51-100M (10 H). F. 60. 2 4 6 8 10 12 14 16 18 20. LED current (mA). Fig. 2 Li-Ion Powered Driver for six white LEDs ORDERING INFORMATION. AIC1896 XXXX PIN CONFIGURATION. PACKING TYPE SOT-23-6 / TSOT-23-6. TR: TAPE & REEL FRONT VIEW 6 5 4. BG: BAG 1: LX. 2: GND. Package TYPE 3: FB 1896/1896P. G: SOT-23-6 4: SHDN. K: TSOT-23-6 5: SS. 6: IN 1 2 3. P: LEAD FREE COMMERCIAL. G: GREEN Package Note: Pin1 is determined by orienting Example: AIC1896 PKTR the Package marking as shown. in Lead Free TSOT-23-6 Package & Tape & Reel Packing Type AIC1896 PGTR.

5 In Lead Free SOT-23-6 Package & Tape & Reel Packing Type TSOT-23-6 Marking Part No. Marking AIC1896PK 896PK. AIC1896GK 896GK. SOT-23-6 Marking Part No. Marking AIC1896PG 1896P. AIC1896GG 1896G. 2. AIC1896. ABSOLUTE MAXIMUM RATINGS. LX to GND to +33V. FB to GND to +6V. IN, SHDN to +11V. SS to GND to +6V. LX Pin RMS current Continuous Power Dissipation 727mW. Operating Temperature Range -40 C to 85 C. Junction Temperature 125 C. Storage Temperature Range -65 C to 150 C. Lead Temperature (soldering, 10s) 260 C. Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.

6 TEST CIRCUIT. L1 D1. VIN VOUT. to 10V + GTSK-51-100M(10uH) +. SS14. C1 R1 C5. U1 AIC1896 C3 C4. 10 F/16V 1 F. 6 1 10 F. IN LX. 4 3. SHDN FB. SHDN SS GND. 5 2 R2. C2 62. F. 3. AIC1896. ELECTRICAL CHARACTERISTICS. (VIN=V SHDN =3V, FB=GND, SS=Open, TA=25 C, unless otherwise specified) (Note 1). PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS. Input Supply Range VIN 10 V. Output Voltage Adjust Range VOUT 30 V. VIN Undervoltage Lockout UVLO VIN rising, 50mV hysteresis V. VFB = , not switching Quiescent current IIN mA. VFB = , switching 1 5. V SHDN = 0, TA = +25 C A.

7 Shutdown Supply current V SHDN = 0 10 A. ERROR AMPLIFIER. Feedback Regulation Set Point VFB V. FB Input Bias current IFB VFB = 21 80 nA. Line Regulation < VIN < %/V. OSCILLATOR. Frequency fOSC 1000 1400 1800 KHz Maximum Duty Cycle DC 82 86 %. POWER SWITCH. Steady State Output current Io Refer to Fig. 13 A. On-Resistance RDS(ON) Vin = 5V 1 . VLX = 30V, TA = +25 C 1. Leakage current ILX(OFF) A. VLX = 30V 10. SOFT-START. Reset Switch Resistance Guaranteed By Design 100 . Charge current VSS = 4 A. CONTROL INPUT. Input Low Voltage VIL V SHDN , VIN = to 10V V. Input High Voltage VIH V SHDN , VIN = to 10V V.

8 V SHDN = 25 50. SHDN Input current I SHDN A. V SHDN = 0 Note 1: Specifications are production tested at TA=25 C. Specifications over the -40 C to 85 C operating temperature range are assured by design, characterization and correlation with Statistical Quality Controls (SQC). 4. AIC1896. TYPICAL PERFORMANCE CHARACTERISTICS. Switching Frequency (MHz). TA=25 C. VIN= Frequency (MHz). -40 -20 0 20 40 60 80 100 2 3 4 5 6 7 8 9 10 11. Supply Voltage (V). Temperature ( C). Fig. 3 Switching Frequency vs. Temperature Fig. 4 Frequency vs. Supply Voltage VIN= Output Voltage (V).

9 RDS(ON) ( ). 2 3 4 5 6 7 8 9 10 11 1 10 100. Supply Voltage (V) Output current (mA). Fig. 5 RDSON vs. Supply Voltage Fig. 6 Load Regulation (L1=10 H). VIN= FB= SHDN= Output Voltage (V). Supply current (mA). 1 10 100. 2 3 4 5 6 7 8 9 10 11. Output current (mA) Supply Voltage (V). Fig. 7 Load Regulation (L1=22 H) Fig. 8 Switching current 5. AIC1896. TYPICAL PERFORMANCE CHARACTERISTICS (Continued). 90. Feedback Voltage (V). A). 85. Supply current (. FB= 80 SHDN= 75. 70 VIN= 65 2 3 4 5 6 7 8 9 10 11 -50 -25 0 25 50 75 100. Supply Voltage (V) Temperature ( C).

10 Fig. 9 Non-Switching current Fig. 10 Feedback Pin Voltage 90 90. VIN= 85 85. VIN= VIN= VIN= VIN= VIN= Efficiency (%). Efficiency (%). 80 80 VIN= VIN= 75 75. VIN= 70 70. 65 VOUT= 65 VOUT=12V. L1: GTSK-51-100M L1: SLF6025-220MR. 60 60. 0 100 200 300 400 500 600 0 50 100 150 200. Output current (mA) Output current (mA). Fig. 11 Efficiency vs. Output current Fig. 12 Efficiency vs. output current (L1=10 H, test circuit refer to ) (L1=22 H, test circuit refer to ). 800 350. Maximum Output current (mA). Maximum Output current (mA). 700 300 VOUT=20V. VOUT=5V VOUT=13V.


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