cat4134 Catalyst Semiconductor, cat4134 Datasheet
cat4134
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cat4134 Summary of contents
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... Catalyst Semiconductor, Inc. Characteristics subject to change without notice. DESCRIPTION The CAT4134 is a high power, dual channel boost converter which provides two matched LED currents. Output current levels are controlled by one of two resistors RSET or RFLASH. When the FLASH input pin is low (movie mode), RSET sets the current. When FLASH is high (flash mode), the resistor RFLASH sets the LED current ...
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... CAT4134 ABSOLUTE MAXIMUM RATINGS Parameters SW voltage VIN voltage EN, FLASH, RSET, RFLASH voltage LED1, LED2 voltage Output Current per Channel Storage Temperature Range Junction Temperature Range Lead Temperature ESD Rating – Human Body Model (HBM) RECOMMENDED OPERATING CONDITIONS Parameter VIN Ambient Temperature Range ...
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... FLASH Both Flash and Movie Mode (lower voltage pin is regulated 21.6kΩ SET R = 43.2kΩ FLASH R = 21.6kΩ FLASH In Movie mode In Flash mode FLASH > V Flash Enabled FHI FLASH = 3V 3 CAT4134 Min Typ Max Unit 1.20 1.30 V 1.20 1.30 V 400 100 ...
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... CAT4134 TYPICAL CHARACTERISTICS VIN = 3.6V, FLASH = VIN 4.7µ otherwise specified. LED Current Regulation (100mA load) 2.0 1.5 1.0 1 LED 0.5 0.0 2 LEDs -0.5 -1.0 -1.5 -2.0 2.5 3.0 3.5 INPUT VOLTAGE [V] Current Gain vs. RFLASH 1900 2 LEDs 1850 VIN= 3.6V 1800 1750 1700 1650 1600 0 50 100 Rflash [kohm] Efficiency vs. Output Current (Flash mode ...
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... Power-up Transient (2 LEDs at 200mA) Power-up Transient (2 LEDs at 200mA) Switching Waveform in Flash mode (2 LEDs) © Catalyst Semiconductor, Inc. Characteristics subject to change without notice. = 10µ 22µH with 2 LEDs at 100mA, T OUT Power-up Transient (2 LEDs at 200mA) Power-up Transient (2 LEDs at 200mA) 5 CAT4134 = 25ºC, unless AMB Doc. No. MD-5021 Rev. B ...
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... CAT4134 TYPICAL CHARACTERISTICS VIN = 3.6V 4.7µ 10µ 22µH with 2 LEDs at 100mA OUT Switching Frequency vs. Supply Voltage 1300 1200 Movie mode 20mA per LED 1100 1000 Flash mode 50mA per LED 900 800 2.5 3.0 3.5 INPUT VOLTAGE [V] Doc. No. MD-5021 Rev. B AMB Enable Flash waveform 4 ...
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... As soon as the OVP pin voltage falls under the V threshold, the part starts switching OVP again. TAB is the exposed pad underneath the package. For best thermal performance, the tab should be soldered to the PCB and connected to the ground plane. 7 CAT4134 Doc. No. MD-5021 Rev. B ...
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... CAT4134 DEVICE OPERATION The device is powered from the input pin VIN. A switching frequency of 1.2MHz is used in Movie mode, when the FLASH input is low. Continuous LED current up to 50mA is controlled by the RSET resistor. For higher load current, the Flash mode is selected by setting the FLASH input pin high. RFLASH now controls the LED current ...
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... APPLICATION INFORMATION The typical application for the CAT4134 camera-equipped cellular phone where the LEDs are used for illumination in flash mode with short duration high-current pulse and in movie mode with continuous lighter load. In movie mode, the FLASH pin is set low. Note: Hot-plugging the LEDs while the output is fully charged is not recommended ...
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... CAT4134 TYPICAL APPLICATIONS The CAT4134 can drive one or two strings LEDs in series resulting in combinations LEDs. The resistor ratio R1/R2 sets the maximum VOUT during an open-LED fault condition and provides the overvoltage protection. 2 LED Application 4 LED Application Doc. No. MD-5021 Rev. B For applications with 2 LEDs in series and VOUT at 10V, the ratio R1/ ...
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... All dimensions are in millimeters. (2) Complies with JEDEC standard MO-229 © Catalyst Semiconductor, Inc. Characteristics subject to change without notice. (1) ( SIDE VIEW A A1 MAX 0.80 0.05 0.228 0.30 3.10 2.50 3.10 1.75 0.50 0. 0.80 3.10 11 CAT4134 PIN BOTTOM VIEW A3 FRONT VIEW RECOMMENDED LAND PATTERN Doc. No. MD-5021 Rev. B ...
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... All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The standard lead finish is NiPdAu. (3) The device used in the above example is a CAT4134HV2-GT2 (TDFN, NiPdAu, Tape and Reel, 2,000/Reel). (4) For additional package and temperature options, please contact your nearest Catalyst Semiconductor Sales office. Doc. No. MD-5021 Rev. B (1) – ...
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... Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a situation where personal injury or death may occur. ...