FAN5343UMPX Fairchild Semiconductor, FAN5343UMPX Datasheet
FAN5343UMPX
Specifications of FAN5343UMPX
Related parts for FAN5343UMPX
FAN5343UMPX Summary of contents
Page 1
... Cellular Mobile Handsets Mobile Internet Devices Portable Media Players PDA, DSC, MP3 Players Ordering Information Part Number Temperature Range FAN5343UMPX - °C © 2009 Fairchild Semiconductor Corporation FAN5343 • Rev. 1.0.4 Description The FAN5343 is an asynchronous constant-current LED driver capable of efficiently delivering up to 500mW to a string of six (6) LEDs in series ...
Page 2
... Typical Application Diagram Block Diagram © 2009 Fairchild Semiconductor Corporation FAN5343 • Rev. 1.0.4 Figure 1. Typical Application Figure 2. Block Diagram 2 www.fairchildsemi.com ...
Page 3
... FB this pin to a current setting resistor ( Switching Node. Tie inductor L1 from the VIN to SW pin. Ground. Tie directly to a GND plane. 6 GND © 2009 Fairchild Semiconductor Corporation FAN5343 • Rev. 1.0 GND 3 Figure 3. UMLP6 Package (Top View) Description ) between GND and the cathode of the LED string. ...
Page 4
... JEDEC standard JESD51. Special attention must be paid not to exceed junction temperature given ambient temperate T J(max) Symbol θ Junction-to-Ambient Thermal Resistance JA © 2009 Fairchild Semiconductor Corporation FAN5343 • Rev. 1.0.4 Parameter Human Body Model per JESD22-A114 Charged Device Model per JESD22-C101 Conditions 500mW Maximum Output Power ...
Page 5
... SW leakage current includes the leakage current of two internal switches GND and SW to VOUT. 3. Not tested in production, but guaranteed by design 4. Application should guarantee that minimum and maximum duty cycle fall between 20-85% to meet the specified range. © 2009 Fairchild Semiconductor Corporation FAN5343 • Rev. 1.0.4 Conditions EN = GND 3.6V ...
Page 6
... Figure 4. 6 LEDs: Efficiency vs. LED Current vs. Input Voltage 5 LEDs L = 10µ 1.0µF OUT Figure 6. 5 LEDs: Efficiency vs. LED Current vs. Input Voltage Figure 8. Efficiency vs. Input Voltage vs. Temperature © 2009 Fairchild Semiconductor Corporation FAN5343 • Rev. 1.0.4 = 1.0µF OUT 6 LEDs L = 10µ 1.0µF OUT I ...
Page 7
... LED Figure 10. Line Transient Response for 6 LEDs Figure 12. Startup Waveform for Switch Voltage, Inductor Current and EN for 6 LEDs FB © 2009 Fairchild Semiconductor Corporation FAN5343 • Rev. 1.0.4 = 1.0µF OUT Figure 11. Dimming Operation of FAN5343 Figure 13. Steady-State Waveform for V Switch Voltage, and Inductor Current for 6 LEDs ...
Page 8
... With this single-wire solution, the FAN5343 does not require the system processor to constantly supply a signal to drive the LEDs. © 2009 Fairchild Semiconductor Corporation FAN5343 • Rev. 1.0.4 Digital Dimming Control The FAN5343 starts driving the LEDs at the maximum brightness level ...
Page 9
... FAN5343 is typically powered by a power supply with relatively long cables, an additional input capacitor (10µF) may be needed to ensure stable functioning. This capacitor should be placed close to where the power supply cables attach to the FAN5343 evaluation board. © 2009 Fairchild Semiconductor Corporation FAN5343 • Rev. 1.0.4 Manufacturer Min. C Murata TDK 1.00µ ...
Page 10
... Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’ ...
Page 11
... Fairchild Semiconductor Corporation FAN5343 • Rev. 1.0.4 11 www.fairchildsemi.com ...