M81709FP

Device Overview
The M81709FP is a high-voltage, dual-channel (half‑bridge) MOSFET/IGBT gate driver presented in a 16‑pin SOP package. Designed for industrial applications like HID ballasts, plasma displays, inverters, and motor drivers, it delivers ±2 A pulse output capability for robust switching control.

High‑Voltage and Current Handling

* Bus Voltage (VB – GND): up to 600 V
* Floating (High‑Side) Supply (VBS): 10–20 V
* Output Current (peak): ±2.5 A (pulse, <10 µs)
* Output Current (continuous): ±2.0 A typical under test conditions

Input and Logic Interface

* Logic Supply (VCC): 10–20 V
* Gate Drive Levels (VHO, VLO): High: ~14.4 V; Low: ~0.1 V
* Logic Input Voltage Range: 0 to VCC
* Input Thresholds:

* High: 2.1–4.0 V
* Low: 0.6–2.0 V
* Input Bias Currents:

* High level: up to 75 µA
* Low level: ≤1 µA

Protections & Interlocks

* Shoot‑through prevention: ensures both outputs are never on simultaneously
* Under-voltage lockout (UVLO) on VCC and VBS with built-in hysteresis and ~7.5 µs delay filters

Switching Characteristics (CL = 1 000 pF)

* Propagation Delays:

* High‑side: On/Off: 100–170 ns
* Low‑side: On/Off: 100–170 ns
* Rise/Fall Times:

* High‑side: tr ≈ 20–35 ns, tf ≈ 15–25 ns
* Low‑side: same as high‑side
* Matched delay resolution: ≤30 ns

Thermal & Power Ratings

* Package Power Dissipation: 0.9 W at 25 °C (on‑board)
* Thermal Resistance: RθJC ≈ 50 °C/W; linear derating: –9 mW/°C above 25 °C
* Operating Temp.: –20 °C to +100 °C; storage to +125 °C

Absolute Maximum Ratings

* VB to GND: –0.5 to 624 V
* VS (floating return): VB – 24 V to VB + 0.5 V
* Logic pins: –0.5 to VCC + 0.5 V
* dV/dt tolerance: Clamp withstand of ±50 V/ns

Package & Pinout

* Package: 16‑lead SOP, height ≈2.1 mm, RoHS-compliant
* Pin Highlights:

* High-side gate output: HO
* Low-side gate output: LO
* Floating supply: VB, VS
* Logic inputs: HIN, LIN
* Logic supply: VCC, GND
* Compact layout ideal for space-constrained PCB designs

Application Use-Cases

* Half‑bridge and full‑bridge topologies in power conversion
* Gate driver for IGBTs/MOSFETs in industrial motor controllers
* HID lamp ballasts and plasma display inverters
* General-purpose high-voltage gate-driving modules

Design Recommendations

* Use recommended PCB layout for thermal dissipation
* Power-up: apply VCC before VBS; power-down sequence reversed to avoid misfiring
* Include HV bypass capacitors close to VB–VS pins
* Maintain clean and fast logic control signals within thresholds

Conclusion
The Powerex M81709FP is a robust, high-voltage half-bridge driver offering ±2 A gate drive currents, fast switching speeds, shoot-through prevention, UVLO, and strong dV/dt immunity. Its compact SOP package and thermal capability make it suitable for industrial power electronics, lighting ballast control, and efficient inverter systems.