FAN5236QSCX Fairchild Semiconductor, FAN5236QSCX Datasheet
FAN5236QSCX
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FAN5236QSCX_NL
FAN5236QSCX_NLTR
FAN5236QSCX_NLTR
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FAN5236QSCX Summary of contents
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... Calculations and Simulation Tools for FAN5234 or FAN5236 Application Note — AN-1029 Maximum Power Enhancement Techniques for SO-8 Power MOSFET © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3.2 Description The FAN5236 PWM controller provides high efficiency and regulation for two output voltages adjustable in the range of 0 ...
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... Part Number Temperature Range FAN5236MTCX -10 to +85°C Block Diagrams +5 VCC +5 ILIM1 DDR +5 PG2/REF 1.25V © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3.2 Package 28-Lead Thin-Shrink Small-Outline Package (TSSOP) VCC FAN5236 ILIM1 PWM 1 DDR ILIM2/ REF2 PWM 2 Figure 1. Dual-Output Regulator V FAN5236 ...
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... Current Limit 1. A resistor from this pin to GND sets the current limit. 12 SS1 Soft Start. A capacitor from this pin to GND programs the slew rate of the converter during initialization. During initialization, this pin is charged with a 5mA current source. 17 SS2 © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3.2 AGND VCC 1 28 LDRV1 ...
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... VCC. This pin powers the chip as well as the LDRV buffers. The IC starts to operate when 28 VCC voltage on this pin exceeds 4.6V (UVLO rising) and shuts down when it drops below 4.3V (UVLO falling). © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3.2 Description reference. DDQ outside a ± ...
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... Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol V V Supply Voltage Supply Voltage Ambient Temperature A Θ Thermal Resistance, Junction to Ambient JA © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3.2 Parameter Parameter Min. 4.75 5 Min. Max. 6 6.5 -0.3 V +0.3 CC -40 +150 ...
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... VOUT Pin Input Impedance UVLO Under-Voltage Shutdown TSD UVLO Over-Voltage Threshold I Over-Current Threshold SNS Output Drivers HDRV Output Resistance LDRV Output Resistance © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3.2 Conditions LDRV, HDRV Open, V Forced Above SEN Regulation Point Shutdown (EN- 24V IN V ...
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... DDR OSC VIN CLK VSEN EA FPWM/VOUT SS Reference and PGOOD Soft Start REF2 © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3.2 (Continued) Conditions % of Set Point, 2µs Noise Filter % of Set Point, 2µs Noise Filter IPG = 4mA PULLUP ≤10mA DDR = 1, 0mA < I REF2OUT ...
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... Suitable for typical notebook computer application of 4A continuous, 6A peak for V above 6A is required, use single SO-8 packages. For more information, refer to the Power MOSFET Selection Section and use AN-6002 for design calculations. © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3.2 VIN ...
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... Dual MOSFET with Schottky 30 DDR Controller Note currents above 4A continuous are required, use single SO-8 packages. For more information, refer to the Power MOSFET Selection Section and AN-6002 for design calculations. © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3.2 VIN C1 14 BOOT1 6 ...
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... V keep noise generated from the switching transition in one converter from influencing the "decision" to switch in the other converter. © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3.2 When V 7.5V. As shown in Figure 7, 180° operation is undesirable because the turn-on of the V ...
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... In Hysteretic Mode, the low-side MOSFET is operated as a synchronous rectifier, where the voltage across © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3.2 frequency PWM Mode, as shown in Figure 11. This mode achieves high efficiency at nominal load. When ...
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... ON ) ⎝ ⎠ © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3.2 Because of the different control mechanisms, the value of the load current where transition into CCM operation takes place is typically higher compared to the load level at which transition into Hysteretic Mode occurs. ...
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... Any delay along that path subtracts from the delay generated by the adaptive dead-time circuit and shoot- through may occur. © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3.2 Frequency Loop Compensation of the FET, as shown Due to the implemented current-mode control, the ...
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... If at any time from the ninth to the sixteenth clock cycle, the ILIM det is again reached, the over-current protection latch is set, disabling the © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3.2 regulator. If ILIM det does not occur between cycles ...
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... KHz SW therefore: L ≈ 6 µH © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3.2 Output Capacitor Selection The output capacitor serves two major functions in a switching power supply. Along with the inductor, it filters the sequence of pulses produced by the switcher and it supplies the load transient currents. The output capacitor requirements are usually dictated by ESR, inductor ripple current (Δ ...
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... V I ⎜ ⎟ = × × ⎜ s ⎟ ⎝ ⎠ × × OUT COND OUT © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3.2 P UPPER and P COND given MOSFET. R temperature (T time), shown as t2+t3 in Figure 17 (24 − (25 (26 DS(ON) vs. GS The driver’s impedance and C t3’ ...
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... PCB area that JA can be devoted to heat sinking (see FSC Application Note AN-1029 — Maximum Power Enhancement Techniques for SO-8 Power MOSFETs) . © 2002 Fairchild Semiconductor Corporation FAN5236 • Rev. 1.3 which can be as Layout Considerations IN Switching converters, even during normal operation, ...
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... 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’ ...
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... Fairchild Semiconductor Corporation FAN5236 Rev. 1.3.2 19 www.fairchildsemi.com ...