AIC1647 AIC [Analog Intergrations Corporation], AIC1647 Datasheet
AIC1647
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AIC1647 Summary of contents
Page 1
... AIC1647 is a step-up PWM converter, which includes an internal N-channel MOSFET switch for high efficiency. The high switching frequency, 1.2MHz, allows the use of tiny external components, saves the layout space and cost. AIC1647 is available in a space-saving, 5-lead SOT-23-5 package =4.2V IN ...
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... D1: RB521S-30, ROHM C1: JMK107BJ105KA, TAIYO YUDEN C2: EMK212BJ224KG, TAIYO YUDEN ORDER NUMBER AIC1647CV&PV (SOT-23-5) PV 1647P L1 D1 10µH VIN SW D2 BZV55-B12 SHDN 11.8V~12.2V GND FB R1 AIC1647 1K AIC1647 PIN CONFIGURATION FRONT VIEW SHDN VIN GND FB 6V 33V 6V 6V –40°C to 85°C 125°C – ...
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... Non switching SHDN =95mV OSC DC R DS(ON =33V SW(OFF OFF IL =25°C. Specifications over the -40°C to 85°C operating A AIC1647 MIN TYP MAX UNIT 2 100 µA 0.1 1 105 0.8 1.2 1.6 MHz Ω ...
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... Fig. 5 100 3LEDs 60 100Hz 40 500Hz 20 1KHz 2KHz 0 0 5.0 5.5 6.0 Fig. 7 AIC1647 0 50 100 Temperature (°C) Switching Frequency vs. Temperature FB=GND Switching Supply Voltage (V) Supply Current vs. Supply Voltage =3.6V; L=10µH =1µF, C =0.22µF OUT & 200Hz 3KHz PIN PWM Duty (%) ...
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... D1: RB521S-30, ROHM Test circuit refer to Fig LED Current (mA) Fig LEDs Efficiency vs. LED Current 6 LEDs, 6.8µH L1: 976AS-6R8M, TOKO D1: RB521S-30, ROHM Test circuit refer to Fig LED Current (mA) Fig LEDs Efficiency vs. LED Current AIC1647 =3. =3. =4.2V IN =3.6V V =3. ...
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... Temperature (°C) Fig. 18 LED Current vs. Temperature =0.22µF; I =20mA LED 11.0 10.5 10.0 9.5 9.0 8.5 8.0 7.5 7.0 =0.22µF; I =10mA LED 4 LEDs 100 AIC1647 (Continued 2V/div SHDN I , 100mA/div INDUCTOR V , 20V/div OUT V =3.6V; 6 LEDs; L1=10µF; C =0.22µ OUT LED Fig. 15 Start-Up from Shutdown 3 LEDs I =20mA LED 6 Samples' Temperature Data ...
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... Slope 1.2MHz Oscillator Compensation Current AMP + - Pin. Connect PIN 4: SHDN - Shutdown pin. Tie to higher than Pin. Reference PIN 5: VIN 95mV. Connect AIC1647 SHDN SW Driver M1 RS GND resistor here. Calculate resistor value according to the formula 95mV/I FB LED 1.5V to enable device, 0.3V or less to disable device. ...
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... Open-Circuit Protection In the cases of output open circuit, when the LEDs are disconnected from the circuit or the LEDs fail, the feedback voltage will be zero. AIC1647 will then switch to a high duty cycle resulting in a high output voltage, which may cause SW pin voltage to exceed its maximum 33V rating ...
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... DC voltage source in dimming control. The circuit is shown in Figure 22. D1 RB512S-30 L1 10µH VIN SW D2 BZV55-B12 SHDN 11.8V~12.2V GND FB R1 AIC1647 1K D1 RB512S-30 L1 10µH VIN SW D2 BZV55-B12 SHDN 11.8V~12.2V GND FB AIC1647 R1 R2 PWM 1K 51K AIC1647 C2 1µF 20mA RFB 4.7Ω C2 1µF 20mA RFB 4.7Ω 9 ...
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... DC 1K 51K D1 RB512S-30 L1 10µH VIN SW D2 BZV55-B12 SHDN 11.8V~12.2V GND FB AIC1647 PWM 5.1K 51K 1K C3 0.1µ 10µH RB521S-30 VIN SW SHDN GND FB AIC1647 R2 1K AIC1647 C2 1µF 20mA R FB 4.7Ω C2 1µF 20mA R FB 4.7Ω C2 1µF 20mA 4.7Ω 4.7Ω 10 ...
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... SEE VIEW WITH PLATING e e1 BASE METAL L SECTION A-A L1 θ GAUGE PLANE SEATING PLANE AIC1647 SOT-25 MILLIMETERS MIN. MAX. 0. 0.05 0.15 0.90 1.30 0.30 0.50 0.08 0.22 2.80 3.00 2.60 3.00 1.50 1.70 0.95 BSC 1.90 BSC 0.30 0.60 0.60 REF 0° 8° ...