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参数资料
| 型号： | ADP1877HC-EVALZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 16/32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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ADP1877
SHORT - CIRCUIT AND CURRENT - LIMIT
PROTECTION
When the output is shorted or the output current exceeds the
current limit set by the R ILIM resistor for eight consecutive cycles,
the ADP1877 shuts off both the high-side and low-side drivers
and restarts the soft start sequence every 10 ms, which is known
as hiccup mode. The SS node discharges to zero through an
internal 1 kΩ resistor during an overcurrent or short-circuit
event. Figure 29 shows that the ADP1877 (a 20 A application
circuit) is entering current limit hiccup mode when the output
is shorted.
Data Sheet
SHUTDOWN CONTROL
The EN1 and EN2 pins are used to enable or disable Channel 1
and Channel 2, respectively, of the ADP1877 . The precision enable
threshold for EN1/EN2 is typically 0.63 V. When the EN1/EN2
voltage rises above 0.63 V, the ADP1877 is enabled and starts
normal operation after the soft start period. When the voltage
at EN1/EN2 drops below 0.57 V, the switchers and the internal
circuits in the ADP1877 are turned off. Note that EN1/EN2
cannot shut down the LDO at VCCO, which is always active.
For the purpose of start-up power sequencing, the startup of the
ADP1877 can be programmed by connecting an appropriate
resistor divider from the master power supply to the EN1/EN2
pin, as shown in Figure 30. For instance, if the desired start-up
voltage from the master power supply is 10 V, R1 and R2 can be
1
SW1
set to 156 kΩ and 10 kΩ, respectively.
3
SS1
INDUCTOR CURRENT
MASTER
SUPPLY
VOLTAGE
R1
R2
ADP1877
EN1 FB1
OR OR
EN2 FB2
V OUT1
R TOP
R BOT
4
Figure 30. Optional Power-Up Sequencing Circuit
CH1 10V
CH3 500mV
CH4 10A ?
M2ms
A CH1
11.2V
THERMAL OVERLOAD PROTECTION
Figure 29. Current Limit Hiccup Mode, 20 A Circuit
The ADP1877 has an internal temperature sensor that senses
the junction temperature of the chip. When the junction
temperature of the ADP1877 reaches approximately 155°C, the
ADP1877 goes into thermal shutdown, the converter is turned
off, and SS discharges toward zero through an internal 1 kΩ
resistor. At the same time, VCCO discharges to zero. When the
junction temperature drops below 135°C, the ADP1877 resumes
normal operation after the soft start sequence.
Rev. D | Page 16 of 32
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| ADP1878-0.6-EVALZ | 功能描述:BOARD EVAL FOR ADP1878-0.6 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 |
| 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 |
| ADP1878ACPZ-0.3-R7 | 功能描述:IC REG CTRLR BUCK PWM CM 14LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 特色产品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 标准包装:1 系列:PowerWise® PWM 型:电压模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.5 V ~ 18 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:-5°C ~ 125°C 封装/外壳:32-WFQFN 裸露焊盘 包装:Digi-Reel® 产品目录页面:1303 (CN2011-ZH PDF) 其它名称:LM3754SQDKR |
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