Toshiba offers photocouplers ideal for isolated interfacing to an intelligent power module (IPM). IPM-drive photocouplers are available with an output in open-collector and inverting and noninverting totem-pole configurations. Therefore, you can find optimal photocouplers that best fit your needs, regardless of the input configuration (active level) of the driven IPM.
Photocouplers with a maximum operating temperature (Topr) of 125°C
Clearance/Creepage Distance | 8 mm*1 | 5 mm | 7 or 8 mm*2 | 7 or 8 mm*2 | 4 mm | |
---|---|---|---|---|---|---|
Date Rate (Typ.) |
Output Configuration | SO6L |
![]() SO6 |
![]() SDIP6 / SDIP6 (F type) |
![]() DIP8 / DIP8 (F type) |
SO8 |
1 Mbps | Open collector![]() |
TLP2719 TLP2719(LF4) |
TLP109(IGM)![]() |
TLP719 TLP719F |
TLP759 TLP759F |
|
Open collector![]() |
TLP2704![]() TLP2704(LF4) ![]() |
TLP104![]() |
TLP714![]() TLP714F ![]() |
TLP754![]() TLP754F ![]() |
TLP2404![]() |
|
5 Mbps | Totempole (Buffer logic type) ![]() |
TLP2355![]() |
TLP715 TLP715F |
TLP2955![]() TLP2955F ![]() |
TLP2405 | |
Totempole (Inverter logic type) ![]() |
TLP2358![]() |
TLP718 TLP718F |
TLP2958![]() TLP2958F ![]() |
TLP2408 | ||
sink/source input |
||||||
10 Mbps | Totempole (Buffer logic type) ![]() |
TLP2735![]() TLP2745 |
TLP2345 | |||
Totempole (Inverter logic type) ![]() |
TLP2748 | TLP2348 |
*1: SO6L package has the wide lead option (LF4)
*2: DIP8 and SDIP6 packages with clearance and creepage distances of 8 mm are available.
To order photocouplers in a package with guaranteed clearance and creepage distances of 8 mm, suffix the part number with the letter F. Example: TLP754F
1.Interfacing with active-Low and active-High IPMs
Commercially available IPMs have either an active-High control input (that turns on an internal IGBT when High) or an active-Low control input (that turns on an internal IGBT when Low). Toshiba offers IPM-drive photocouplers with a noninverting output (that produce a High output when the LED input is on) for active-High IPMs and those with an inverting output (that produce a Low output when the LED input is on) for active-Low IPMs. You can use photocouplers with an appropriate output configuration to adapt system boards for different IPMs without an intervening inverter IC. The elimination of an on-board inverter IC makes it possible to share the same board design across different products.
2. Guaranteed CMR of 20 kV/µs
Since the IPM control input changes with a steep dv/dt, the photocoupler that drives it typically requires a CMR higher than 10 kV/µs. The CMR of a photocoupler can be improved by adding a shield across its input and output and bypassing displacement current to ground.
To provide a CMR over 10 kV/µs, many of Toshiba's IPM-drive photocouplers have a shield for the photodetector chip. These photocouplers are ideal for interfacing to the IPM control signal. The TLP2355 and TLP2358 in particular provide a CMR as high as 20 kV/µs.
3. Propagation delay variations
Since IPM-drive photocouplers transfer a PWM signal, they must switch fast enough, generally with propagation delay times (tpHL/tpLH) of less than 800 ns. The TLP104 provides a propagation delay of 550 ns or less, while the TLP2358 has a propagation delay of 250 ns or less. Additionally, the TLP2358 guarantees a tpLH-tpHL difference of at most 70 ns and a propagation delay skew (between different devices), Tpsk, of at most ±130 ns. It helps improve the PWM signal transmission accuracy.
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