MD3221N 查看數據表（PDF） - Shindengen
零件编号
产品描述 (功能)
比赛名单
MD3221N Datasheet PDF : 26 Pages
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Item
Soft start
Current at soft start pin
Error amp
Error amp reference voltage
Over-Current protection detector
Threshold current at ON resistance detection
Threshold voltage at external resistance detection
Timer latch circuit
Timer current
Voltage at S/S pin prior to timer operation
Latch threshold voltage
Output voltage detector
Output voltage detect accuracy (set at 0.8V)
Output voltage detect accuracy (set at 2.5V)
Output voltage detect accuracy (set at 3.3V)
Over temperature protection detector
Overheat protection operation temperature
Condition
Vcc = 5V
Vcc = 5V
Vcc = 5V
Vcc = 5V
Vcc = 5V
Vcc = 5V
Vcc = 5V
Vcc = 4.5〜20V
Vcc = 4.5〜20V
Vcc = 4.5〜20V
−
Min.
Typ.
Max.
Unit
-3
-2.5
-2
μA
0.784
0.800
0.816
V
3
−
−
A
85
100
115
mV
-40
-33
-26
μA
2.75
2.9
3.05
V
3.3
3.45
3.6
V
0.784
0.800
0.816
V
2.425
2.500
2.575
V
3.200
3.300
3.400
V
−
140
−
℃
◆Internal Block Diagrams
● Block Diagram
Vcc
Vref
Vboot VB
VGH VDD
6
2
7 24
23 18~21
R/C 1
(L.Active)
ON/OFF
CONTROL
Vref
S/S
32
BANDGAP
REFERENCE
1.26V±1%
UVLO
-
THERMAL
SHUTDOWN
VCC +
SRQ
LATCH
LATCH
QRS
CURRENT
LIMIT1
+
-
ampOUT 28
ERROR-AMP
amp- 29
PWM-COMP
OCL-
OSC
CURRENT
LIMIT2
SRQ
LATCH
Vref
VOUT
CURRENT
LIMIT3
SRQ
LATCH
INVL
VOUT
11~14
4,26
GND
3
31 30
25 27
OSC
ampIN
OCL-
2.5V/3.3V
OCL+
5
8
9
16
LC
P.GND1
VGL P.GND2
※N/C : 10,15,17,22
※ (Resistance)
6
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