TLP 5702 Gate Driver Coupler Sop-6

 

If your board needs a gate driver optocoupler that drives an IGBT or a power MOSFET gate, and the old part on the board is marked TLP5702, this is the part to order. It is a TLP5702 gate driver in a thin 6-pin SO6L surface-mount package, with the control side and the power side kept apart by light. It fits small to medium IGBT and power MOSFET gate drive in industrial inverters, air conditioner inverters, induction cooktops, and home appliances. It does not fit a through-hole DIP-8 board, a supply below 15 V, or a job that needs more than ±2.5 A of peak gate current. Check the checks below before you order, so the part number, the package, the pins, and the supply all match your board.

This is an original, high-quality part.

What it does

A gate driver optocoupler sits between a low-voltage control circuit and a high-voltage power switch. Inside this part, an infrared LED shines across a gap onto a photodetector chip, so the control signal crosses as light and no electric current crosses. That light barrier gives 5000 Vrms of isolation between the two sides. The output is a totem-pole stage that can both push and pull current, so it can charge an IGBT or MOSFET gate fast to turn it on, and discharge it fast to turn it off. This TLP5702 part drives the gate with up to ±2.5 A of peak current, which suits small to medium power switches.

Because the output follows the input (input high gives output high, input low gives output low), the part is simple to wire into a control circuit. Its internal noise shield holds the output steady even when the high-voltage side swings fast — up to ±30 kV/µs — so the switch does not turn on by mistake.

Key features

• Peak output current: ±2.5 A for IGBT and MOSFET gate drive
• Totem-pole (buffer logic) output — non-inverting
• Isolation voltage: 5000 Vrms
• Propagation delay: 200 ns at most
• Common-mode transient immunity: ±30 kV/µs at least
• Supply voltage: 15 to 30 V
• Supply current: 3.0 mA at most
• Thin 6-pin SO6L package, 2.3 mm high at most
• Creepage and clearance: 8.0 mm at least
• Working temperature: −40 °C to +110 °C

Checks before you order

• Part number: the marking must read TLP5702 exactly. If your old part shows a different number or an extra letter, stop and check your board list again. Do not judge by the package alone — other 6-pin gate drivers do a different job.
• Package and pins: your board must take a 6-pin SO6L surface-mount part, with pin 1 Anode, pin 2 not connected, pin 3 Cathode, pin 4 GND, pin 5 output, pin 6 VCC. This is not a DIP-8 part — a DIP-8 gate driver optocoupler has a different footprint and different pins, and is not a swap for this board.
• Supply voltage: the detector supply must be 15 to 30 V. Below about 13.5 V the built-in under-voltage lockout can hold the output off, so a 12 V supply is the wrong pick for this part. Check your supply before you order.
• Bypass capacitor: a 0.1 µF ceramic capacitor must sit between pin 6 (VCC) and pin 4 (GND), within 1 cm of the pins. Without it, the part may not switch properly.
• Input drive: the LED needs enough input current to switch — the threshold is 5 mA at most, and the recommended on-state current is 6.5 to 10 mA. A weak control signal that cannot give that current will not drive this part.
• Output current: the ±2.5 A figure is a short peak for charging a gate, not a steady current. Check the gate charge of your IGBT or MOSFET and the switching frequency (50 kHz at most) before you order.
• Isolation: the 5000 Vrms figure is a 60-second test voltage, and the creepage is 8.0 mm. Check that your board keeps that spacing and that your working voltage suits the reinforced insulation rating.

Specifications

All figures below are for the TLP5702 part at +25 °C unless noted. No figure here was guessed.

Type	Photocoupler, infrared LED + photodetector IC, buffer logic, totem-pole output
Package	6-pin SO6L, surface mount, 2.3 mm high max
Pin assignment	1: Anode, 2: N.C., 3: Cathode, 4: GND, 5: VO (output), 6: VCC
Bypass capacitor	0.1 µF ceramic between pin 6 (VCC) and pin 4 (GND), within 1 cm
Output peak current	±2.5 A max (±2.0 A recommended)
Supply voltage	15 to 30 V
Supply current, max	3.0 mA
Threshold input current, max	5 mA
Input forward voltage	1.55 V typical, 1.70 V max at 10 mA, 25 °C
Propagation delay time, max	200 ns (typical 50 ns)
Propagation delay skew, max	±80 ns
Common-mode transient immunity, min	±30 kV/µs
Isolation voltage, min	5000 Vrms (AC, 60 s)
Operating temperature	−40 °C to +110 °C
Creepage / clearance, min	8.0 mm / 8.0 mm
UVLO turn-on / turn-off	12.5 V typical / 11.0 V typical
Operating frequency, max	50 kHz

Other names for the same part (good to know)

Shoppers and repair techs call this same part by a few names. TLP5702 is the full part number, and it is also the code printed on the body. TLP5702 gate driver is the plain name from its job. Gate driver optocoupler is the plain name for what it is — a light-isolated driver for a power switch gate. IGBT gate driver is the job name buyers use when they need to drive an IGBT. MOSFET gate driver is the job name buyers use when they need to drive a power MOSFET. If you see TLP5702 on a thin 6-pin surface-mount body, and your board needs a 2.5 A gate driver with 5000 Vrms isolation, this page is the right match. Do not judge by the package alone — check the part number, the pins, and the supply too.

Frequently Asked Questions

What does a gate driver optocoupler do?

It drives the gate of an IGBT or a power MOSFET while keeping the low-voltage control circuit electrically apart from the high-voltage power circuit. The signal crosses inside the part as light, so a fault on the power side cannot reach the control side.

Why does the output stay off when the supply is low?

The part has a built-in under-voltage lockout. It turns the output on only when the supply rises past about 12.5 V, and turns it off again if the supply falls below about 11 V. The supply must be 15 to 30 V in normal use, so a 12 V supply is too low for this part.

Why is a 0.1 µF capacitor needed between pins 6 and 4?

The capacitor steadies the detector supply right at the part. Without it, the high-gain detector may not switch properly. It must be a ceramic capacitor, placed within 1 cm of pins 6 and 4.

Can this part drive an IGBT directly?

Yes, for small to medium IGBTs and power MOSFETs. Its totem-pole output gives up to ±2.5 A of peak gate current. Check the gate charge of your switch and keep the switching frequency at or below 50 kHz.

What is the difference between this part and a general-purpose optocoupler?

A general-purpose optocoupler only passes a small signal and cannot drive a gate. This part has a high-gain photodetector and a totem-pole output stage built to push and pull amps of gate current, with a fast 200 ns delay and strong noise immunity.

What is the price of this part?

Check the live price on the website.

Use note kept from the old page: this part was listed before as a photocoupler in a 6-pin SO6L package, with an infrared LED optically coupled to a high-gain, high-speed photodetector IC, guaranteed specs up to 110 °C, smaller and thinner than an 8-pin DIP part, built for reinforced insulation with an internal noise shield, ideal for small to medium IGBT and power MOSFET gate drive, and used in induction cooktops and home appliances, industrial inverters, air conditioner inverters, and MOSFET and IGBT gate drivers — and that use still stands.

You can view and download the datasheet for this part from the Download button on this page.