MD3221N 查看數據表（PDF） - Unspecified
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MD3221N Datasheet PDF : 26 Pages
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◆Pin Layout
R/C : 1
Vref : 2
OSC : 3
GND : 4
LC : 5
Vcc : 6
Vboot : 7
P.GND1 : 8
VGL : 9
N/C : 10
VOUT : 11
VOUT : 12
VOUT : 13
VOUT : 14
N/C : 15
P.GND2 : 16
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□
□
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32 : S/S
31 : 2.5V/3.3V
30 : ampIN
29 : amp-
28 : ampOUT
27 : OCL-
26 : GND
25 : OCL+
24 : VB
23 : VGH
22 : N/C
21 : VDD
20 : VDD
19 : VDD
18 : VDD
17 : N/C
◆Pin Functions
Pin number
1
2
3
4,26
5
6
7
8
9
11〜14
16
18〜21
23
24
25
27
28
29
30
31
32
10,15,17,22
Symbol
R/C
Vref
OSC
GND
LC
Vcc
Vboot
P.GND1
VGL
VOUT
P.GND2
VDD
VGH
VB
OCL+
OCL-
ampOUT
amp-
ampIN
2.5V / 3.3V
S/S
N/C
Function description
Remote ON / OFF control
Internal reference voltage output
Oscillation frequency select
Control circuit GND
Cut-off detect select
Control circuit power supply
Low side MOSFET drive circuit power supply
Low side MOSFET drive circuit GND
Low side MOSFET gate. Please do not conect the pin anywhere.
Output
Low side MOSFET sources
High side MOSFET power supply
High side MOSFET gate. Please do not conect the pin anywhere.
High side MOSFET drive circuit power supply
Over-current +ve detect at external resistance detection
Over-current -ve detect at external resistance detection
Internal error amplifier output
Internal error amplifier inverted input
Internal voltage detect resistor output
2.5V / 3.3V output select
Soft start condenser connection
Non-connection (not connected internally)
Refer to '7. Selection of Primary Components and Pin Connections' and '10. Functions' for function descriptions and pin connections.
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