ame5144 AME, Inc., ame5144 Datasheet
ame5144
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ame5144 Summary of contents
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... AME AME5144 n General Description The AME5144 is an efficient driver for up to ten white LED applications. They are ideal for large LCD backlight displays in Cell Phone, PDAs, and other handheld devices. The AME5144 is switch-mode boost converter with con- stant LED current, rather than output voltage. The series ...
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... 2.2 F Analog or PWM Dimming 200Hz to 30KHz n Function Block Diagram 170mV CTRL Bright Control CS GND 2 Converter for White LEDs L=22 H OUT SW AME5144 IN PGND CTRL GND CS COMP Shutdown 8.2ms Gm Ramp Generator Oscillator High Efficiency, 37V Step-Up Output Up to 37V C OUT 0 COMP ...
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... CS 5 COMP 6 GND 7 PGND 8 SW Rev.D.01 High Efficiency, 37V Step-Up Converter for White LEDs AME5144-AVAxxx 1. OUT CTRL COMP 6. GND 7. PGND * Die Attach Conductive Epoxy Pin Description Overvoltage Sense. When OUT is greater than 38.5V(Typ.), the internal n- channel MOSFET turns off until OUT drops below 37V(Min), then the IC reenters soft-start Connect a 0 ...
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... AME AME5144 n Ordering Information AME5144 - xxx Pin Configuration & Special Feature A 1. OUT 2. IN (DFN-8C) 3. CTRL COMP 6. GND 7. PGND Available Options Part Number Marking* AME5144-AVAADJ AMYMXX Note: 1. The first 2 places represent product code assigned by AME such as AM. ...
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... AME AME5144 n Absolute Maximum Ratings Parameter GND IN CTRL, CS, COMP, to GND SW, OUT to GND PGND to GND ESD Classification Caution: Stress above the listed absolute maximum rating may cause permanent damage to the device. * HBM B: 2000V ~ 3999V n Recommended Operating Conditions Parameter Storage Temperature Range ...
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... AME AME5144 n Electrical Specifications V = 3V Parameter Input voltage Adjustable Output Range Input Undervoltage Locked Input Undervoltage Locked Hysteresis Quiescent Current Shutdown Current Over Voltage Protection Over Voltage Protection Hysteresis OUT Input Bias Current CTRL to CS Regulation CS Input Bias Current ...
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... AME AME5144 n Electrical Specifications (contd.) Parameter CS to Comp Transconductance COMP Input Resistance to Ground Switch Frequency Minimum Duty Cycle Maximum Duty Cycle Switch On-Resistance Switch Leakage Current Switch Current Limit Note the forward-voltage drop of the Schottky diode in Typical Application. Note 2: Time from CTRL going below the Dual-Mode threshold to IC shutdown. ...
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... AME AME5144 n Detailed Description The high efficiency and small size of the AME5144 make them ideally suited to driver up to ten series-connected LEDs. They operate as a boost DC-DC converter that con- trols output current rather than voltage. A low 300mV cur- rent-sense threshold minimized the losses. The AME5144 ...
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... Sumida CDRH5D16NP- 220MB are recommended. Rev.D.01 Converter for White LEDs Schottky Diode Selection The high switching frequency of the AME5144 demands a high-speed rectification diode (D1) for optimum efficiency. A Schottky diode is recommended due to its fast recovery time and low forward-voltage drop. Ensure that the diode's average and peak current rating exceed the average out- put current and peak inductor current ...
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... AME AME5144 Duty Cycle The maximum duty cycle of the switching regulator de- termines the maximum boost ratio of output-to-input volt- age that the converter can attain in mode of operation. The duty cycle for a given boost application is defined as: This applies for continuous mode operation. ...
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... AME AME5144 Efficiency vs Input Voltage 100 3 LEDs 95 4 LEDs LEDs 70 8 LEDs LEDs Input Voltage(V) LED Current vs Direct-PWM Dimming Duty Cycle(%) Switching Waveforms OUT I L 400 ns/div Rev.D.01 ...
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... AME AME5144 Ctrl Step Response V CTRL LED V OUT 20ms /div 310 308 306 -40 304 A 302 300 298 296 294 292 290 2.6 3 Converter for White LEDs V 1V/ div CTRL V IN 100mA/div V 50mA/div OUT ...
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... AME AME5144 n Date Code Rule Month Code 1: January 7: July 2: February 8: August 3: March 9: September 4: April A: October 5: May B: November 6: June C: December n Tape and Reel Dimension DFN-8C (3mmx3mmx0.75mm) PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) DFN-8C (3x3x0.75mm) Rev.D.01 ...
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... AME AME5144 n Package Dimension DFN-8C (3mmx3mmx0.75mm) D TOP VIEW A REAR VIEW SYMBOLS 14 Converter for White LEDs MILLIMETERS MIN MAX A 0.700 0.800 D 2.900 3.100 E 2.900 3.100 e 0.600 0.700 D1 2.200 2.400 E1 1.400 1.600 b 0.200 0.320 L 0.375 0.575 G 0.153 0.253 G1 0.000 0.050 ...
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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. ...