FAN3278 Fairchild Semiconductor, FAN3278 Datasheet
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FAN3278
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FAN3278 Summary of contents
Page 1
... MOSFET turn-on / turn-off transition to minimize switching loss. The internal gate-drive regulators provide optimum gate-drive voltage when operating from a rail 27V. The FAN3278 can be driven from a voltage rail of less than 8V; however, its gate drive current is reduced. The FAN3278 has two independent ENABLE pins that default not connected ...
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... Ordering Information Part Number FAN3278TMX Non-Inverting Channel and Inverting Channel with Dual Enable Figure 2. Typical 3-Phase Blower Motor Drive Application © 2010 Fairchild Semiconductor Corporation FAN3278 • Rev. 1.0.0 Logic 2 Input Packing Threshold Method 2,500 Units on TTL Tape & Reel www.fairchildsemi.com ...
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... Gate Drive Output B (inverted from the input). Held HIGH unless the required input is present 5 OUTB and V is above the internal voltage threshold where the IC is functional VDD Supply Voltage. Provides power to the IC. © 2010 Fairchild Semiconductor Corporation FAN3278 • Rev. 1.0.0 Figure 3. Pin Configuration (Top View) (1) ( Description 3 ...
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... Note: 7. Default input signal if no external connection is made. Block Diagram V DD 100k ENA 1 INA 2 100k GND 3 INB 4 100k © 2010 Fairchild Semiconductor Corporation FAN3278 • Rev. 1.0.0 FAN3278 (Channel B) OUTA ENB ( ( 13V LS Predriver Low-Side Drive Regulator ...
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... Supply Voltage Range DD V Enable Voltage (ENA, ENB Input Voltage (INA, INB Operating Ambient Temperature A © 2010 Fairchild Semiconductor Corporation FAN3278 • Rev. 1.0.0 Parameter Human Body Model, JEDEC JESD22-A114 Charged Device Model, JEDEC JESD22-C101 Parameter 5 Min. Max. Unit -0.3 30.0 V GND - 0 ...
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... Timing Diagrams 90% Output 10% Input V INH or V Enable INL t D1 Figure 5. Non-Inverting © 2010 Fairchild Semiconductor Corporation FAN3278 • Rev. 1.0.0 =-40°C to +125°C. Currents are defined as positive into the device ( Conditions (8) INA=ENA=V DD (9) INA=ENA from from (10) (11) ...
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... Notes: 8. The internal gate-drive regulators provide optimum gate-drive voltage when operating from a rail 27V. The FAN3278 can be driven from a voltage rail of less than 8V; however, with reduced gate drive current inputs have near-TTL thresholds (refer to the ENABLE section). 10. Not tested in production. ...
Page 8
... Typical Performance Characteristics Typical characteristics are provided at T Figure 7. I (Static) vs. Supply Voltage DD Figure 9. I (No Load) vs. Frequency DD Figure 11. Input Thresholds vs. Temperature © 2010 Fairchild Semiconductor Corporation FAN3278 • Rev. 1.0.0 =25°C and V =12V unless otherwise noted (12) Figure 8. I Figure 10 (12) (Static) vs ...
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... Note: 12. For any inverting inputs pulled LOW, non-inverting inputs pulled HIGH, or outputs driven HIGH; static I increases by the current flowing through the corresponding pull-up/down resistor, shown in Figure 4. © 2010 Fairchild Semiconductor Corporation FAN3278 • Rev. 1.0.0 =25°C and V =12V unless otherwise noted Figure 13 ...
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... The FAN3278 startup logic is optimized to drive a ground- referenced N-channel MOSFET with channel A and a V -referenced P-channel MOSFET with channel B. DD The optimum operating voltage of the FAN3278 27V. It has an internal “watchdog” circuit that provides a loose UVLO turn-on voltage (V ON with a small hysteresis of about 10mV. However recommended that V is greater than 4 ...
Page 11
... BYP channel is switching. Layout and Connection Guidelines The FAN3278 gate driver incorporates fast-reacting input circuits, short propagation delays, and powerful output stages capable of delivering current peaks over 1.5A to facilitate fast voltage transition times. The following layout and connection guidelines are strongly recommended: ...
Page 12
... B Differences between FAN3278 and FAN3268 FAN3278 and FAN3268 are pin-compatible to each other and are designed to drive one P-Channel and one N-channel MOSFET in applications such as battery-powered compact fan / pump DC motor drives. However, there are key differences, highlighted in Table 1. ...
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... FAN3122T Single 9A +9.7A / -7.1A FAN3122C Single 9A +9.7A / -7.1A Notes: 13. Typical currents with OUT at 6V and V 14. Thresholds proportional to an externally supplied reference voltage. © 2010 Fairchild Semiconductor Corporation FAN3278 • Rev. 1.0.0 Input (13) Threshold CMOS Single Channel of Dual-Input/Single-Output (14) External Single Non-Inverting Channel with External Reference ...
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... 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/. © 2010 Fairchild Semiconductor Corporation FAN3278 • Rev. 1.0 1.75 4 ...
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... Fairchild Semiconductor Corporation FAN3278 • Rev. 1.0.0 15 www.fairchildsemi.com ...