TLP250 Optocoupler Power Mosfet Gate Driver DIP-8

TLP250 Optocoupler Power Mosfet Gate Driver DIP-8 is a specialized high-speed gate drive optocoupler designed to provide isolated control for power MOSFETs and IGBTs in high-voltage switching applications. This essential component effectively bridges the gap between low-voltage control circuits (like microcontrollers) and high-power switches. Therefore, the TLP250 delivers high current output capability, crucial for quickly charging and discharging the gate capacitance of large power devices. Featuring an infrared LED coupled to an integrated high-speed driver circuit, it guarantees excellent isolation (up to 2500 V_RMS) and reliable performance. Furthermore, its low propagation delay makes it perfectly suited for high-frequency switching circuits like AC motor drives and inverter systems.

Key Features:

• High Output Current: Provides a robust peak output current (±1.5 A), enabling rapid switching of large power MOSFETs and IGBTs to minimize switching losses.
• High Isolation Voltage: Offers a minimum isolation voltage (V_ISO) of 2500 V_RMS, ensuring safe electrical separation between the primary (control) and secondary (power) stages.
• Wide Operating Voltage: Supports a broad V_CC range for the output side, typically from 10 V to 35 V, accommodating various gate drive requirements.
• Fast Switching Speed: Achieves a low propagation delay (t_pLH / t_pHL ≤ 0.5 μs), suitable for high-frequency pulse width modulation (PWM) applications.
• Hysteresis Function: Features built-in hysteresis for noise immunity, preventing output oscillations near the switching threshold.

Technical Specifications:

• Peak Output Current (I_OP): ±1.5 A (Maximum)
• Isolation Voltage (V_ISO): 2500 V_RMS (Minimum)
• Supply Voltage (V_CC): 10 V to 35 V
• Input Threshold Current (I_FT): Maximum 5 mA (Required current to turn the output on)
• Propagation Delay (t_pLH/t_pHL): Maximum 0.5 μs
• Operating Temperature Range: −40°C to +100°C
• Pin 7/8 UVLO: Undervoltage Lockout protection prevents the gate driver from functioning when the supply voltage is too low.

Mechanical Specifications:

• Package Type: DIP-8 (Through-Hole)
• Material: Epoxy Resin Encapsulation
• Creepage Distance: Minimum 7.0 mm (Ensuring adequate surface isolation)
• Mounting: Through-Hole Technology (THT)

Dimensions:

• Body Length: ≈ 9.9 mm
• Body Width: ≈ 6.5 mm
• Row Spacing (Between rows): 7.62 mm (0.3 inch)
• Pin Pitch (Between pins): 2.54 mm (0.1 inch)
• Total Height: ≈ 3.5 mm (Seated height)

Pinout and Wiring:

• Pin 1 (Anode): Connect to the positive input signal of the control circuit (e.g., from a microcontroller’s PWM pin, via a current limiting resistor).
• Pin 2 (Cathode): Connect to the ground/return path of the control circuit.
• Pin 3 (N.C.): No connection.
• Pin 4 (N.C.): No connection.
• Pin 5 (GND): Output ground terminal. Connect this to the emitter of the IGBT or source of the MOSFET.
• Pin 6 (V_O): Output terminal. Connect this pin directly to the gate of the power MOSFET or IGBT.
• Pin 7 (V_CC): Output supply voltage (typically 15 V or higher) for the gate drive stage.
• Pin 8 (V_EE): Output emitter/reference terminal, often tied to Pin 5 (GND).

Datasheet Reference:

• Download Toshiba TLP250 Gate Driver Optocoupler Datasheet

Commonly Used in:

• Motor Drives: Providing the critical isolated drive signal for switching components in AC variable frequency drives (VFDs) and DC motor controllers.
• Power Supplies: Essential for high-frequency switching in resonant power supplies, DC-DC converters, and isolated power stages.
• Inverters and Converters: Forming the gate drive mechanism for components in Uninterruptible Power Supplies (UPS) and solar inverters.

Applications:

• IGBT and MOSFET Gate Drive: Directly drives the power switches required in bridge topologies (half-bridge and full-bridge).
• Switching Power Amplifiers: Used in specialized audio and RF amplifiers that rely on high-efficiency switching.
• High-Side/Low-Side Switching: Provides necessary isolation in bootstrap circuits for driving high-side MOSFETs.

Equivalent Models:

• HCPL-3120 (Broadcom/Avago): A functionally similar 0.5A output current gate drive optocoupler, often used as an alternative. However, check output current compatibility closely.
• PC923 (Sharp): Another isolated gate driver IC, providing comparable isolation and switching speed for IGBT/MOSFET applications.
• TLP350 (Toshiba): A pin-compatible upgrade featuring higher peak output current (±2.5 A), offering a performance enhancement option.

Package Includes:

• 1 x TLP250 Optocoupler Power Mosfet Gate Driver IC DIP-8