-32-
IC BLOCK DIAGRAM -3/3
XA-DV1
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a
SUPPLY
MANAGEMENT
internal
supply
UVLO
start
M-level
VCC
1
2
3
GND
S1
CTRL
FREQUENCY
CONTROL
VOLTAGE
CONTROLLED
OSCILLATOR
LOGIC
LOGIC
OVER-
VOLTAGE
PROTECTION
OVERPOWER
PROTECTION
short
winding
soft
start
S2
OVER-
TEMPERATURE
PROTECTION
S
Q
R
UVLO
Q
MAXIMUM
ON-TIME
PROTECTION
POWER-ON
RESET
−
1
VALLEY
100 mV
clamp
DRIVER
START-UP
CURRENT SOURCE
0.75 V
0.5 V
5
Sense
6
DRIVER
4
DEM
8
DRAIN
7
HVS
n.c.
OCP
LEB
blank
Iss
2.5 V
burst
detect
IC, TEA1507P
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QQ 376315150
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TEL 13942296513
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9
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Q
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TEL 13942296513 QQ 376315150 892498299