ame5142 AME, Inc., ame5142 Datasheet
ame5142
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ame5142 Summary of contents
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... AME, Inc. AME5142 n General Description The AME5142 is a Boost DC/DC converter specifically designed to drive white LEDs with a constant current. The device can drive one to six LEDs in series from a Li- lon cell. Series connection of the LEDs provides identi- cal LED currents resulting in uniform brightness and elimi- nating the need for ballast resistors ...
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... AME, Inc. AME5142 Function Block Diagram EN IN Vref UVLO 1.25V + GM 0.15V - FB Soft Rc Start White LED Boost Converter SHUTDOWN CIRCUITRY OTP RAMP ∑ - GENERATOR R CURRENT LIMIT COMP Oscillator Figure 4 : AME5142 Block Diagram In Tiny Package OVP Vref DRIVER MS1 + - GND SW Rev. A.04 ...
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... Tie this pin below 0.4V to turn off the device. Analog and Power input. Input Supply Pin. Bypass this pin with a capacitor as close to the device as possible. White LED Boost Converter In Tiny Package Top View AME5142AEEY GND AME5142 ...
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... AME, Inc. AME5142 n Pin Description AME5142AEEY Pin Number Pin Name GND OVP White LED Boost Converter Pin Description Power Switch input. This is the drain of the internal NMOS power switch. Minimize the metal trace area connected to this pin to minimize EMI. ...
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... AME, Inc. AME5142 n Ordering Information AME5142 xxx x Operating Ambient Pin Temperature Configuration Range - GND (SOT-25 (TSOT-25 GND (SOT-26 (TSOT-26 OVP Ordering Information Part Number Marking* AME5142AEEYADJZ ...
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... AME, Inc. AME5142 n Absolute Maximum Ratings Parameter Input Supply Voltage EN, FB Voltages SW, OVP Voltage ESD Classification Caution: Stress above the listed in absolute maximum ratings may cause permanent damage to the device. * HBM B: 2000V ~ 3999V n Recommended Operating Conditions Parameter Ambient Temperature Range Junction Temperature Range ...
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... AME, Inc. AME5142 n Electrical Specifications V = 4.2V Parameter Input Voltage Quiescent Current Feedback Trip Point FB Pin Bias Current Switch Current Limit Switch On-Resistance SW Leakage Current Swich frequency Maximum Duty Cycle Shutdown Supply Current Over Temperature Protection Over Voltage Protection ...
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... F ceramic output capacitors creating an overall small solution for white LED applications. Under Voltage Protection The AME5142 has an UVP comparator to turn the NMOS power device off in case the input voltage or battery volt- age is too low preventing an on state of the power device conducting large amounts of current ...
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... I I (max) - LOAD SW Thermal Considerations At higher duty cycles, the increased ON time of the FET means the maximum output current will be determined by power dissipation within the AME5142 switch. The switch power dissipation from ON-state conduction is calculated by (ON) (SW) IND(AVE)2 ...
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... Application Hints Dimming Control A. Using a PWM Signal to EN Pin For controlling the LED brightness, the AME5142 can perform the dimming control by applying a PWM signal to EN pin. The average LED current is proportional to the PWM signal duty cycle. The magnitude of the PWM signal should be higher than the maximum enable voltage of EN pin, in order to let the dimming control perform correctly ...
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... V VS VDC FB 150 125 100 0.2 0.4 VDC(V) Rev. A. 2. AME5142 EN OVP FB GND VDC Dimming Figure 6. Dimming Control Using a DC Voltage 0.6 0.8 1 White LED Boost Converter In Tiny Package V OUT C OUT 5. 7.5 91K VDC ...
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... The circuit is shown in Figure 4 Duty Cycle FB 150 125 100 0.2 0.4 Duty Cycle 2. AME5142 EN OVP GND PWM Signal 20KHZ Figure 7. Dimming Control Using a Filtered PWM Signal 0.6 0.8 1 White LED Boost Converter In Tiny Package V OUT C OUT 5. 91K 7.5 ...
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... Figure 8: Six White LEDs Application in Li-Ion Battery 2. AME5142 EN OVP GND Figure 9: Eight White LEDs Application in Li-Ion Battery 3. AME5142 EN OVP FB GND Figure 10: Six White LEDs Application in Li-Ion Battery Rev. A.04 V OUT C OUT OVP FB R2 7.5 V OUT C OUT ...
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... Figure 11: Six White LEDs Application in Li-Ion Battery 3. AME5142 EN GND Figure 12: Eight White LEDs Application in Li-Ion Battery 3. 4.7 F AME5142 EN OVP GND Figure 13: Eight White LEDs Application in Li-Ion Battery 14 V OUT C OUT OVP 7.5 7.5 V OUT C OUT SW ...
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... V 3. AME5142 EN OVP FB GND Figure 15: Ten White LEDs Application in Li-Ion Battery 3. AME5142 EN OVP FB GND Figure 16: Twelve White LEDs Application in Li-Ion Battery Rev. A.04 White LED Boost Converter V OUT 100 C OUT 7.5 7 ...
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... AME, Inc. AME5142 n Application Hints 3. AME5142 EN OVP GND Figure 17: Twelve White LEDs Application in Li-Ion Battery 16 V OUT C OUT 7.5 7.5 White LED Boost Converter In Tiny Package Efficiency Vs I OUT 3. 4. 3.6V IN ...
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... AME, Inc. AME5142 Max Duty Cycle vs. Temperature 92.0 91.8 91.6 91.4 91.2 91.0 90.8 90.6 90.4 90.2 90.0 89.8 89.6 89.4 89.2 89.0 88.8 88.6 88.4 88.2 88.0 - Temperature ( Switch RDSON 1.80 1.60 1. 1.20 A 1.00 0.80 0.60 0.40 0.20 2.7 3.1 3.5 3.9 V (V) IN Efficiency vs. Load Current Dirving 4 LEDs 100 2.7 3.1 3.5 3 Rev. A.04 75 100 125 4.3 4.7 5.1 5.5 4.3 4.7 5.1 5.5 White LED Boost Converter In Tiny Package Oscillator Frequency vs. Temperature 1 ...
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... AME, Inc. AME5142 Current Limit vs. V 1000 950 900 850 800 750 700 650 2.7 3.1 3.5 3.9 V (V) IN Dimming Control for Driving 6LEDs 1mS / div V = 2.7V; 6 LEDs 20mA OUT div 200Hz 10V / div, DC OUT 10V / div ...
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... AME, Inc. AME5142 Dimming Control for Driving 6LEDs div V = 2.7V; 6 LEDs 20mA OUT div 200KHz 10V / div, DC OUT 10V / div Start-Up / Shutdown 200 S / Div V = 2.7V; 1 LEDs 20mA OUT 2V/div Inductor Current, 100mA / div, DC ...
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... AME, Inc. AME5142 Start-Up / Shutdown 200 S / div V = 5.5V; 6 LEDs 20mA OUT div Inductor Current, 500mA / div 10V / div, DC OUT Typical Switching Waveform div V = 5.5V; 6 LEDs 20mA OUT 10V / div 20mV / div, AC ...
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... AME, Inc. AME5142 n Date Code Rule Marking Date Code Tape and Reel Dimension SOT-25 PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) SOT-25 Rev ...
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... AME, Inc. AME5142 n Tape and Reel Dimension TSOT-25 PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) TSOT-25 SOT-26 PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) SOT- AME AME Pitch (P) 8.0± ...
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... AME, Inc. AME5142 n Tape and Reel Dimension TSOT-26 PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) TSOT-26 8.0±0.1 mm Rev. A.04 White LED Boost Converter P AME AME Pitch (P) Part Per Full Reel 4.0±0 Tiny Package W Reel Size 3000pcs 180± ...
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... AME, Inc. AME5142 n Package Dimension SOT-25 Top View D PIN Front View b TSOT-25 Top View D PIN Front View b 24 White LED Boost Converter Side View SYMBOLS θ Side View SYMBOLS θ1 A Tiny Package MILLIMETERS MIN MAX MIN A 1.20REF ...
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... AME, Inc. AME5142 n Package Dimension SOT-26 Top View D e PIN 1 S1 Front View b TSOT-26 Top View D e PIN 1 S1 Front View b Rev. A.04 White LED Boost Converter Side View SYMBOLS θ Side View SYMBOLS θ1 A ...
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... These products of AME, Inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. ...