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| 型号： | ADP1877HC-EVALZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/32页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION 13A ADP1877 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 2，非隔离 |
| 输出电压： | 1.05V，1.8V |
| 电流 - 输出： | 13A |
| 输入电压： | 6 ~ 14 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 600kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | ADP1877 |
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Dual Output Synchronous Buck
PWM Controller
Data Sheet
FEATURES
Input voltage range: 2.75 V to 14.5 V
Output voltage range: 0.6 V to 90% V IN
Maximum output current greater than 25 A per channel
Programmable frequency: 200 kHz to 1.5 MHz
Flex-Mode architecture with integrated drivers
180° phase shift minimizes input ripple current and required
ADP1877
ranges from 200 kHz to 1.5 MHz. The ADP1877 provides an
output voltage accuracy of ±0.85% from ?40°C to +85°C and
±1.5% from ?40°C to 125°C in junction temperature. This part
can be powered from a 2.75 V to 14.5 V supply, operates over
the ?40 o C to +125 o C junction temperature range, and is availa-
ble in a 32-lead 5 mm × 5 mm LFCSP package.
input capacitance
±0.85% output voltage accuracy ?40°C to +85°C
R AMP1
VIN
Integrated boost diodes
Pulse skip high efficiency mode under light load
Power good with internal pull-up resistor
Overvoltage and overcurrent limit protection
Thermal overload protection
Input undervoltage lockout (UVLO)
RAMP1
EN1
EN2
VDL
VCCO
PGOOD1
PGOOD2
VIN
DH1
BST1
SW1
ILIM1
FB1
M1
L1
R TOP1
M2
VOUT1
Externally adjustable soft start, slope compensation and
current sense gain
Independent precision enable inputs
Synchronization input
Suitable for any output capacitors
Available in 32-lead 5 mm × 5 mm LFCSP
TRK1
TRK2
SYNC
FREQ
COMP1
COMP2
DL1
PGND1
RAMP2
DH2
BST2
R CSG1
R RAMP2
M3
VIN
L2
R BOT1
VOUT2
APPLICATIONS
Set top boxes
Printers
Communication infrastructure
Distributor power dc systems
SS1
SS2
AGND
SW2
ILIM2
FB2
DL2
PGND2
R CSG2
R TOP2
M4
R BOT2
Industrial and instrumentation
GENERAL DESCRIPTION
100
Figure 1. Typical Operation Circuit
The ADP1877 is a Flex-Mode? (proprietary architecture of
Analog Devices, Inc.), dual-channel, step-down switching
controller with integrated drivers that drive N-channel
synchronous power MOSFETs. The two PWM outputs are
phase shifted 180°, which reduces the input RMS current, thus
minimizing required input capacitance.
The boost diodes are built into the ADP1877 , thus lowering the
overall system cost and component count. The ADP1877 can
be set to operate in pulse skip high efficiency mode under light
load or in PWM continuous conduction mode.
90
80
70
60
50
40
30
20
10
V O = 3.3V PSM
V O = 1.8V PSM
V O = 1.8V PWM
V O = 3.3V PWM
The ADP1877 includes externally adjustable soft start, output
overvoltage protection, externally adjustable current limit,
0
0.01
0.1
1
LOAD (A)
V IN = 12V, 300kHz
10 100
power good, and a programmable oscillator frequency that
Rev. D
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or
other rights of third parties that may result from its use. Specifications subject to change without
notice. No license is granted by implication or otherwise under any patent or patent rights of
Analog Devices. Trademarks and registered trademarks are the property of their respective
owners.
Figure 2. Efficiency Plot of Figure 42, 20 A Output
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ?2009–2012 Analog Devices, Inc. All rights reserved.
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| ADP1878-1.0-EVALZ | 功能描述:BOARD EVAL FOR ADP1878-1.0 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:* 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND |
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