MTS62C19A datasheet(11/20 Pages) MICROCHIP

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DS22260C-page 11

MTS62C19A

4.0

APPLICATION CIRCUITS AND

ISSUES

4.1

Typical Application

The MTS62C19A circuit, with external components for

a typical application, is shown in Figure 4-1. Typical

passive component values are: RS = 1, RC = 1 k,

CC = 820 pF, Rt = 56 k and Ct = 820 pF.

FIGURE 4-1:

Typical Application Circuit.

During PWM operation, when the output stage is

turned-on, large voltage peaks might appear across

RS, which can wrongly trigger the input comparator. To

avoid an unstable current control, an external RCCC fil-

ter should be used that delays the comparator action.

Depending on load type, many applications will not

require this filter (SENSE connected to COMPIN).

VLOGIC

VLOAD

10 to 30V

VREF1

VREF2

100 nF

PHASE1

PHASE2

I01

I11

I02

I12

100 nF

100 µF

Logic

Current

Sense

Comparator

Current

Sense

Comparator

One-shot

Under-V

Lockout

Thermal

Shutdown

Shift

Drivers

Shift

Drivers

OUT1A

OUT1B

OUT2A

OUT2B

COMPIN1

COMPIN2

RC2

RC1

GND

SENSE1

SENSE2

Power

Bridge

Power

Bridge

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