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参数资料
| 型号： | ADP1829ACPZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 21/28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： | 93% |
| 电源电压： | 3 V ~ 20 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 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) |
| 配用： | ADP1829-EVALZ-ND - BOARD EVALUATION ADP1829 |
| 其它名称： | ADP1829ACPZ-R7DKR |
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Data Sheet
Type II Compensator
ADP1829
Next choose the high frequency pole, f P1 , to be 1/2 of f SW .
f P1 ?
G
(dB)
PHASE
–1
S
LO
PE
f Z
f P
–1
S
LO
PE
1
f SW
2
Because C HF << C I , Equation 29 is simplified to
(36)
–180°
–270°
f P1 ?
1
2 ? R Z C HF
(37)
C HF
Solving for C HF in Equation 36 and Equation 37 yields
C HF ?
FROM
V OUT
R TOP
R BOT
R Z
EA
C I
COMP
TO PWM
1
? f SW R Z
Type III Compensator
(38)
VREF
VRAMP
0V
Figure 28. Type II Compensation
G
(dB)
–1
S
LO
PE
+1
S
LO
PE
–1
SL
O
PE
If the output capacitor ESR zero frequency is sufficiently low (≤1/2
of the crossover frequency), use the ESR to stabilize the
Calculate the compensation resistor, R Z , with the following
–90°
PHASE
–270°
f Z
C HF
f P
equation:
R FF
C FF
R Z
C I
V IN f LC
R Z ?
R TOP V RAMP f ESR f CO
2
(31)
FROM
V OUT
R TOP
R BOT
EA
COMP
TO PWM
where:
f CO is chosen to be 1/10 of f SW .
V RAMP is 1.3 V.
VREF
0V
Figure 29. Type III Compensation
VRAMP
f Z 1 ?
?
?
f Z 1 ?
?
f P1 ? f P2 ?
f Z1 ? f Z2 ?
?
?
f CO f SW 1
Next choose the compensation capacitor to set the
compensation zero, f Z1 , to the lesser of 1/4 of the crossover
frequency or 1/2 of the LC resonant frequency:
f CO f SW 1
4 40 2 ? R Z C I
or
f LC 1
2 2 ? R Z C I
Solving for C I in Equation 32 yields
(32)
(33)
If the output capacitor ESR zero frequency is greater than 1/2 of
the crossover frequency, use Type III compensator as shown in
1
f SW (39)
2
(40)
4 40 2 ? R Z C I
or
C I ?
20
? R Z f SW
(34)
f Z 1 ? f Z 2 ?
f LC
2
?
1
2 ? R Z C I
(41)
C I ?
R Z ?
R TOP V RAMP f Z1 f CO
Solving for C I in Equation 33 yields
1
? R Z f LC
Use the larger value of C I from Equation 34 or Equation 35.
(35)
Use the lower zero frequency from Equation 40 or Equation 41.
Calculate the compensator resistor, R Z .
(42)
V IN f LC 2
Because of the finite output current drive of the error amplifier,
Next calculate C I .
C I needs to be less than 10 nF. If it is larger than 10 nF, choose a
larger R TOP and recalculate R Z and C I until C I is less than 10 nF.
C I ?
1
2 π R Z f Z1
(43)
Rev. C | Page 21 of 28
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP1829-BL1-EVZ | 制造商:Analog Devices 功能描述:BLANK ADISIMPOWER EVAL ADP1829 - Boxed Product (Development Kits) |
| ADP1829-BL2-EVZ | 制造商:Analog Devices 功能描述:Evaluation Board For Dual Interleaved Step-Down DC-To-DC Controller With Tracking 制造商:Analog Devices 功能描述:BLANK ADISIMPOWER EVAL ADP1829 - Boxed Product (Development Kits) |
| ADP1829-EVALZ | 功能描述:BOARD EVALUATION ADP1829 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ADP1850 | 制造商:AD 制造商全称:Analog Devices 功能描述:Wide Range Input, Dual/Two-Phase, DC-to-DC Synchronous Buck Controller |
| ADP1850ACPZ | 制造商:Analog Devices 功能描述:IC BUCK CNTRL SYNC 2PH 32LFCSP |
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