Microchip Technology ADM00423 Fiche De Données
MCP16321/2
DS22285A-page 16
© 2011 Microchip Technology Inc.
4.1.9
OVERTEMPERATURE
PROTECTION
PROTECTION
Overtemperature protection limits the silicon die
temperature to +170°C by turning the converter off. The
normal switching resumes at +160°C.
temperature to +170°C by turning the converter off. The
normal switching resumes at +160°C.
FIGURE 4-1:
MCP16321/2 Block Diagram.
Amp
-
+
COMP
-
+
LS
Drive
HS
Drive
Gate Drive
Control
BOOST
Voltage
PGND
Monitor and
Control
EN
PG
OV
Protection
UV
Protection
Current
Limit
OTEMP
Protection
V
REF
and
Softstart
+
+
Slope
Comp
1 MHz
Oscillator
V
OUT
Compensation
COMP
-
+
V
REF
SW
C
BOOST
L
C
OUT
4.2V
R
TOP
R
BOT
V
IN
PFM
Comparator
FB
C
IN
CS
V
OUT
BOOST
PWM
Comparator
SGND
V
OUT
Internal Bias