HBD-E770W
HBD-E770W
68
68
• IC Block Diagrams
– MB-134 Board –
IC303 MM3141CNRE
5
4
1
REGULATOR
CURRENT
LIMIT
VDD
3
BIAS
CE
2
GND
VOUT
NC
IC307 MM3293DNRE
IC308 MP2301ENE-LF-Z
VDD 1
GND 2
CE 3
NC
4
REGULATOR
VOUT
5
SS
8
EN
7
COMP
6
FB
5
CURRENT
SENSE
AMPLIFIER
BS 1
IN 2
SW 3
GND 4
6
Q
Q
S
R
CURRENT
COMPARATOR
OSCILLATOR
340kHz
LOCKOUT
COMPARATOR
ERROR
AMPLIFIER
SHUTDOWN
COMPARATOR
INTERNAL
REGULATORS
+
–
+
–
2.5V
6
P
A
1.5V
0.3V
0.95V
0.8V
1.2V
5V
VO 1
VCC
14
VFB 2
VREG5 3
SS 4
GND 5
PG 6
EN 7
PGND1
8
PGND2
9
SW1
10
SW2
11
VBST
12
VIN
13
VREG5
OCP
VREG5
XCON
CONTROL
LOGIC
EN
LOGIC
REF
-10%
+
+
SOFT START
PROTECTION
LOGIC
REF
VREG5
IC311 BD3539NUX-TR
6
7
5
8
2
1
3
4
VTT_IN
VTT
GND
EN
VCC
VDDQ
VREF
VTTS
SOFT
+
+
TSD
EN
UVLO
VCC
TSD
EN
UVLO
UVLO
TSD
VCC
UVLO
VCC
EN
TSD
EN
UVLO
VCC
+
REFERENCE
BLOCK
THERMAL
PROTECTION
IC312 MM1855AHBE
4
1 2
3
CN
VO
N.C.
GND
REFERENCE
BIAS
CURRENT
LIMITTER
DRIVER
THERMAL
SHUTDOWN
8
VIN
7
N.C.
6
N.C.
5
CONT
IC601, 602 SI-3010KM-TLS
1
VC
TSD
2
VIN
3
GND
4
VOUT
5
ADJ
+
–
REF
IC704 TK11133CSCL-G
IC705 TK11150CSCL-G
CONTROL
CIRCUIT
BANDGAP
REFERENCE
+
–
OVER HEAT &
OVER CURRENT
PROTECTION
1
VCONT
3
NP
2
GND
4
VOUT
5
VIN
IC1001 NJM2878F3-33 (TE2)
5
VIN
4
VOUT
2
GND
3
N.C.
1
CONTROL
BANDGAP
REFERENCE
THERMAL
PROTECTION
IC1002 NJM2828F3-05
5
CS
4
CONTROL
2
VIN
3
VOUT
1
GND
BANDGAP
REFERENCE
OUTPUT
CONTROL
CURRENT
LIMIT
THERMAL
PROTECTION
w w w . x i a o y u 1 6 3 . c o m
Q Q 3 7 6 3 1 5 1 5 0
9
9
2
8
9
4
2
9
8
T E L
1 3 9 4 2 2 9 6 5 1 3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299