2SC4151 datasheet(5/7 Pages) POWEREX

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M57161L-01

Powerex, Inc., 200 E. Hillis Street, Youngwood, Pennsylvania 15697-1800 (724) 925-7272

M57161L-01

Hybrid IC for IGBT Gate Driver

some cases it may not exceed VSC before the tTRIP

delay expires.

If this happens the driver will

erroneously indicate that a short circuit has occurred.

avoid

this

condition

the

M57161L-01

has

provisions for extending the tTRIP delay by connecting

a capacitor (CTRIP) between pins 28 and 18. If tTRIP is

extended care must be exercised not to exceed the

short-circuit withstanding capability of the IGBT

module. Normally this will be satisfied for Powerex F-

Series IGBT modules as long as the total shut-down

time (td) does not exceed 10µs. The total shut down

time (td) consists of the tTRIP delay plus a propagation

delay of approximately 2.5µs. A curve showing the

relationship between td,tTRIP and CTRIP is shown in

Figure 3. The CTRIP capacitor must be selected so

that the gate voltage exceeds VSC before the short-

circuit detection time tTRIP expires.

4. Undervoltage Lock-out

The

M57161L-01

hybrid

gate

driver

designed to operate from a single 15V control power

supply, VD. For proper operation this supply should

be between 14.3V and 15.7V.

If the VD supply

becomes low, then the on-state drive voltage for the

IGBT will also decrease.

In order to prevent

dangerously low drive voltages the M57161L-01 has

an undervoltage protection circuit.

If the output

voltage of the DC-DC converter at pin 19 (VCC)

becomes less than the data sheet specified trip level

(VCL), the output will turn off and a fault signal will be

generated. Figure 4 shows the effect of the UV lock-

out on the gate voltage as a function of input voltage.

In order for normal operation to resume, the VCC

voltage must exceed the undervoltage trip level (VCL). Operation of the undervoltage protection circuit may also

occur during power up and power down. The system controller's program should take this fault into account.

5. Application Circuit for M57161L-01

An example application circuit for the M57161L-01 hybrid gate driver is shown in Figure 5. The input circuit

between pins 5 and 6 consists of the built-in optocoupler’s LED in series with a 390

Ω resistor. This combination is

designed to provide approximately 10mA of drive current for the optocoupler when a control signal of 5V is

applied. If another control voltage is desired then an external current limiting resistor can be added. The value of

the external resistor can be calculated by assuming the forward voltage drop of the optocoupler’s photodiode is

2V. For example, if 15V drive is desired the required external resistor would be: (15V-2V)

÷10mA - 390Ω =910Ω.

The hybrid circuit operates from a single 15V control power supply (VD) that is connected at Pins 1,2 and 3,4.

The control power supply must be decoupled with a capacitor connected as close as possible to the driver’s pins.

This decoupling capacitor is included to provide a stable, well-filtered voltage for the primary side of the driver’s

built-in DC-DC converter. When selecting the input decoupling capacitor it is important to insure that it has a

Figure 3 CTRIP versus tTRIP and td

100

150

200

250

CTRIP (pF)

t(TRIP)

Figure 4 Supply Voltage versus

On-State Gate Voltage

VD (V)

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