FAN5341 Fairchild Semiconductor, FAN5341 Datasheet
FAN5341
Available stocks
Related parts for FAN5341
FAN5341 Summary of contents
Page 1
... For safety, the device features integrated over-voltage, over- current, short-circuit detection, protection. In addition, input under-voltage lockout protection is triggered if the battery voltage is too low. The FAN5341 is available in a very low profile, small form- factor 2mm x 2mm x 0.55mm 6-lead UMLP package that is green and RoHS compliant. Package Eco Status Green 6-lead, 2 ...
Page 2
... Typical Application Diagram Block Diagram © 2009 Fairchild Semiconductor Corporation FAN5341 • Rev. 1.0.0 Figure 1. Typical Application Figure 2. Functional Block Diagram 2 www.fairchildsemi.com ...
Page 3
... Tie this pin to a current setting resistor ( Switching node. Tie inductor L1 from VIN to SW pin. 6 GND Ground. Tie directly to a GND plane. © 2009 Fairchild Semiconductor Corporation FAN5341 • Rev. 1.0 GND 3 EN Figure 3. UMLP6 Package, ^Top View ) between GND and the cathode of the LED string. ...
Page 4
... JEDEC standard JESD51. Special attention must be paid not to exceed junction temperature T given ambient temperature Symbol Parameter θ Junction-to-Ambient Thermal Resistance, UMLP6 Package JA © 2009 Fairchild Semiconductor Corporation FAN5341 • Rev. 1.0.0 Human Body Model per JESD22-A114 Charged Device Model per JESD22-C101 Comments 500mW Maximum Output Power 4 Min. Max. Units -0 ...
Page 5
... SW leakage current includes the leakage current of 2 internal switches GND and SW to VOUT. 2. Not tested in production and guaranteed by design. 3. Application should guarantee that minimum and maximum duty cycle should fall between 20-85% to meet the specified range. © 2009 Fairchild Semiconductor Corporation FAN5341 • Rev. 1.0.0 Conditions EN = GND 3. Rising ...
Page 6
... C = 1.0µF OUT I = 25mA LED VIN=2.8V VIN=3.6V VIN=4. LED Current (mA) Figure 8. 3 LEDs: Efficiency vs. LED Current vs. Input Voltage © 2009 Fairchild Semiconductor Corporation FAN5341 • Rev. 1.0 LEDs L = 4.7µ 1.0µF OUT I = 25mA LED VIN=2.8V VIN=3.6V VIN=4. Figure 5. 5 LEDs: Efficiency vs. LED Current ...
Page 7
... LED Figure 12. Startup Waveform for Switch Voltage, Inductor Current, V and EN for 4 LEDs 0.6V with L=10µH, C OUT © 2009 Fairchild Semiconductor Corporation FAN5341 • Rev. 1.0.0 Figure 11. FAN5341 Dimming Operation at V =1.0µF and OUT =25mA Figure 13.Steady-State Waveform for V =3.6V± IN =1.0µF and I =25mA ...
Page 8
... OUT voltages across each LED, plus the voltage across R which is always 253mV. Driving Five LEDs in Series FAN5341 can drive five LEDs in series but, the forward voltage ( the LED MUST be less than 3.5V such that it F remains under the over-voltage specification of 18.9V. ...
Page 9
... IC as possible; no additional capacitance is needed to ensure proper functionality. However testing environment, where the FAN5341 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 FAN5341 evaluation board. © ...
Page 10
... 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’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2009 Fairchild Semiconductor Corporation FAN5341 • Rev. 1.0.0 2 2.0 ...
Page 11
... Fairchild Semiconductor Corporation FAN5341 • Rev. 1.0.0 11 www.fairchildsemi.com ...