参数资料
型号: ADP1823ACPZ-R7
厂商: Analog Devices Inc
文件页数: 27/32页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM VM 32LFCSP
标准包装: 1
PWM 型: 电压模式
输出数: 2
频率 - 最大: 720kHz
占空比: 90%
电源电压: 3.7 V ~ 20 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: 32-VFQFN 裸露焊盘,CSP
包装: 标准包装
产品目录页面: 791 (CN2011-ZH PDF)
其它名称: ADP1823ACPZ-R7DKR

ADP1823
APPLICATION CIRCUITS
The ADP1823 controller can be configured to regulate outputs
with loads of more than 20 A if the power components, such as
the inductor, MOSFETs, and the bulk capacitors, are chosen
carefully to meet the power requirement. The maximum load
and power dissipation are limited by the powertrain components.
Figure 1 shows a typical application circuit that can drive an
output load of 8 A.
Figure 34 shows an application circuit that can drive 20 A loads.
Note that two low-side MOSFETs are needed to deliver the 20 A
load. The bulk input and output capacitors used in this example
are Sanyo OS-CON capacitors, which have low ESR and high
current ripple rating. An alternative to the OS-CON capacitors
are the polymer aluminum capacitors that are available from
other manufacturers, such as United Chemi-Con. Aluminum
electrolytic capacitors, such as the Rubycon ZLG low-ESR series,
IN = 5.5V TO 20V
1μF
can also be paralleled up at the input or output to meet the
ripple current requirement. Because the aluminum electrolytic
capacitors have higher ESR and much larger variation in
capacitance over the operating temperature range, a larger bulk
input and output capacitance is needed to reduce the effective
ESR and suppress the current ripple. Figure 34 shows that the
polymer aluminum or the aluminum electrolytic capacitors can
be used at the outputs.
C IN2
180μF
20V
1μF
D2
0.47μF
PV IN
TRK1
TRK2
VREG
BST1
EN1
EN2
BST2
D1
0.47μF
C IN1
1μF 180μF
20V
PGND
1.2V, 20A
C OUT2
820μF
25V
×2
1μF
5600pF
390 ?
L2
1μH
M6
2k ?
M4
M5
2 k ?
DH1 DH2
ADP1823
SW1 SW2
CSL1 CSL2
DL1 DL2
PGND1 PGND2
2 k ?
M1
M2
L1
1μH
M3
2k ?
10nF
200 ?
1μF
1.8V, 20A
C OUT1
1200μF
6.3V
×3
2k ?
120nF
1 0k ?
FB1
COMP1
FB2
COMP2
1.5nF
47k ?
1k ?
4.7nF
FREQ
LDOSD
SYNC
GND
AGND
6.8nF
f OSC = 300kHz
M1, M4: IRLR7807Z
L1, L2: TOKO, FDA1254-1ROM
C OUT1 : SANYO, 2R5SEPC820M
D1, D2: VISHAY, BAT54
M2, M3, M5, M6: IRFR3709Z
C IN1 , C IN2 : SANYO, 20SP180M
C OUT2 : RUBYCON, 6.3ZLG1200M10×16
Figure 34. Application Circuit with 20 A Output Loads
Rev. D | Page 27 of 32
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