Datasheet

 2010-2013 Microchip Technology Inc. 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: R
S
= 1, R
C
= 1 k,
C
C
= 820 pF, R
t
= 56 k and C
t
= 820 pF.
FIGURE 4-1: Typical Application Circuit.
During PWM operation, when the output stage is
turned-on, large voltage peaks might appear across
R
S
, which can wrongly trigger the input comparator. To
avoid an unstable current control, an external R
C
C
C
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).
5V
V
LOGIC
V
LOAD
10 to 30V
V
REF1
V
REF2
100 nF
PHASE1
PHASE2
I01
I11
I02
I12
100 nF
100 µF
Logic
Logic
Current
Sense
Comparator
Current
Sense
Comparator
M
One-shot
One-shot
Under-V
Lockout
Thermal
Shutdown
Shift Drivers
Shift Drivers
OUT1A
OUT1B
OUT2A
OUT2B
COMPIN1 COMPIN2
RC2 RC1
GND
SENSE1
SENSE2
R
S
R
S
C
t
R
t
R
t
R
C
R
C
C
t
C
C
C
C
Logic/µP
Power
Bridge
Power
Bridge