Key Specs
| Spec | Value | Condition | Source |
|---|---|---|---|
| Mode | Continuous Conduction (CCM) | Digi-Key | |
| Switching Frequency (Typ) | 22kHz ~ 123kHz | Digi-Key | |
| Voltage Supply | 10.2V ~ 15V | Digi-Key | |
| Operating Temperature Range | -40°C ~ 150°C (TJ) | Digi-Key | |
| Mounting Type | Through Hole | Digi-Key | |
| Package Case | 16-SSIP, 13 Leads, Exposed Pad, Formed Leads | Digi-Key | |
| Supplier Device Package | eSIP-16D | Digi-Key |
When To Use
Use the PFS7723H in power factor correction applications requiring continuous conduction mode (CCM) operation with a switching frequency range typically between 22 kHz and 123 kHz. It is ideal for universal input power supplies delivering output power up to 385 W in high-line packages or 110 W in compact C packages, with a high power factor exceeding 0.95.
Appropriate applications include:
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Industrial power supplies requiring high efficiency (>95%) and low total harmonic distortion (3% typical), operating over a wide input voltage range (90 VAC to 305 VAC steady state, up to 410 VAC abnormal input).
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LED drivers and adapters where a compact through-hole eSIP-16D package and high thermal capability (-40 °C to 150 °C junction temperature) are necessary.
When not to use:
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Low power or discontinuous conduction mode (DCM) applications, as the device is optimized for CCM operation.
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Applications requiring switching frequencies above 1 MHz or below 22 kHz, since the switching frequency max is 1 MHz and min is 22 kHz.
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Designs demanding output power beyond 610 W continuous at 180 VAC high line, where a higher power device or multi-stage PFC solution is recommended.
In these cases, consider alternative devices optimized for DCM operation or higher power ratings.
When Not To Use
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Battery-powered sensor with μA sleep current: The quiescent current at typical operation is 320 mA, far beyond what a low-power sensor needs. Use a low-IQ PFM buck for ultra-low quiescent current and extended battery life.
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High current output > 385 W continuous: The max output power rating for H/L packages is 385 W continuous; exceeding this risks thermal runaway and overstress. Use a multi-phase buck controller to share current and maintain safe junction temperatures.
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Galvanically isolated power supply for medical equipment: The PFS7723H is designed for non-isolated topologies and lacks isolation features. Use an isolated flyback to meet safety and isolation standards.
Application Notes
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The switching node (SW) is connected internally to the drain pin; minimize loop area here to reduce EMI and ringing. Use a low-inductance copper plane and place the catch diode and input capacitors close to the SW node.
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the REF pin, 6 (FB), and the PG pin are noise-sensitive analog inputs for voltage reference, feedback, and power-good signals. Route these with short, shielded traces away from high-current switching nodes to avoid jitter and false fault triggers.
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The exposed pad on the eSIP-16D package must be soldered to a large copper area with multiple thermal vias to maintain junction temperature below 150 °C.
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Use a reference pin capacitor of 0.1 mF ±20% to stabilize the internal reference voltage; values outside 0.1 to 1.0 mF range can cause instability or startup faults.
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The resistor divider on the feedback pin must maintain an impedance ratio of 8 MΩ to 16, matching the 8 MΩ typical upper resistor, to avoid offset errors and inaccurate output voltage regulation.
Gotchas
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Incorrect Reference Pin Capacitor Value
- Mistake: Using a reference pin capacitor value significantly different from the specified 0.1 µF ±20%.
- Failure Mode: Causes instability in the internal reference voltage, leading to erratic switching behavior and potential output voltage regulation failure.
- Fix: Use a ceramic capacitor within the specified 0.1 µF ±20% range directly at the REF pin, with minimal lead length to minimize noise pickup.
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Underrated Diode Selection
- Mistake: Selecting a diode with a peak inverse voltage (PIV) rating below 600 V or with slow reverse recovery time.
- Failure Mode: Results in excessive switching losses, increased electromagnetic interference (EMI), and possible diode or device failure under high voltage spikes.
- Fix: Use