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L6910 데이터시트(PDF) 11 Page - STMicroelectronics

부품명 L6910
상세설명  ADJUSTABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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L6910 데이터시트(HTML) 11 Page - STMicroelectronics

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L6910A L6910
Figure 8. Asymptotic Bode plot of Converter's gain
20A Demo Board Description
The demo board shows the operation of the device in a general purpose application. This evaluation board al-
lows voltage adjustability from 0.9V to 5V through the switches S2-S5 according to the reported table when the
internal 0.9V reference is used (G1 closed). Output current in excess of 20A can be reached dependently on
the kind of mosfet used: up to three SO8 mosfet may be used for both High side and Low side switches. External
reference may be used for the regulation simply leaving open G1 and the switches S2-S5. The device may also
be disabled with the switch S1. The 12V input rail supplies the device while the power conversion starts from
the 5V input rail. The device is also able to operate with a single supply voltage; in this case the jumper G2 has
to be closed and a 5V to 12V input can be directly connected to the VIN input. The four layers demo board's
copper thickness is of 70
µm in order to minimize conduction losses considering the high current that the circuit
is able to deliver. Figure 9 shows the demo board's schematic circuit
Figure 9. 20A Demo Board Schematic
Error Amplifier
ωΖ1
ωΖ2
ωP1
ωP2
ωESR
R5/R3
Modulator Gain
Compensation Network Gain
Error Amplifier
Closed Loop Gain
ωLC
ω
dB
L2
L1
R7
C1 -C3
C14
C4 -11
Q4 -6
Q1 -3
D2
C17
F1
13
14
10
11
3
1
U1
L6910
VIN
VOUT
PWRGD
6
12
5
4
2
15
7
9
VCC
GND
VREF
SS
OSC
OCSET
UGATE
PHASE
LGATE
PGND
PGOOD
C19
R1
C21
C13
D1
GNDIN
GNDOU T
R2
GNDref
+Vref
C12
GNDRef
IN
Ref
IN
C16
G1
C15
R6
C18
8
GNDCC
VCC
R5
G2
R3
R4
C20
S1
S2
S3
S4
S5
R10
R11
R12
R13
EAREF
BOOT
Vout
S2 S3 S4 S5
0.9
1.2
1.5
1.8
2.5
3.3
5.0
Open Open
ON
Ope n Open
Open Open
Open Open
Open Open
Open Open
Open Open
Open Open
ON
ON
ON
Open
Open
ON
ON
ON
ON
Open
Open


유사한 부품 번호 - L6910

제조업체부품명데이터시트상세설명
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