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参数资料
| 型号： | ADP1850ACPZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 15/32页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 32LFCSP |
| 标准包装： | 1 |
| PWM 型： | 电流模式 |
| 输出数： | 2 |
| 频率 - 最大： | 1.725MHz |
| 占空比： | 90% |
| 电源电压： | 2.75 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-WFQFN 裸露焊盘，CSP |
| 包装： | 标准包装 |
| 其它名称： | ADP1850ACPZ-R7DKR |
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Data Sheet
SHORT - CIRCUIT AND CURRENT - LIMIT
PROTECTION
When the output is shorted or the output current exceeds the
current limit set by the current limit setting resistor (between
ILIMx and SWx) for eight consecutive cycles, the ADP1850
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
shows that the ADP1850 on a high current application circuit is
entering current limit hiccup mode when the output is shorted.
ADP1850
SHUTDOWN CONTROL
The EN1 and EN2 pins are used to enable or disable Channel 1
and Channel 2 of the ADP1850 . The precision enable (minimum)
threshold for EN1/EN2 is 0.57 V. When the voltage at EN1/EN2
rises above the threshold voltage, the ADP1850 is enabled and
starts normal operation after the soft start period. And when
the voltage at EN1/EN2 drops typically 30 mV (hysteresis)
below the threshold voltage, the switchers and the internal
circuits in the ADP1850 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
ADP1850 can be programmed by connecting an appropriate
resistor divider from the master power supply to the EN1/EN2
pin, as shown in Figure 29. For instance, if the desired start-up
1
SW1
voltage from the master power supply is 10 V, R1 and R2 can be
set to 156 kΩ and 10 kΩ, respectively.
3
SS1
MASTER
SUPPLY VOLTAGE
V OUT1
INDUCTOR CURRENT
R1
R2
ADP1850
EN1 FB1
OR OR
EN2 FB2
R TOP
R BOT
4
CH1 10V
CH3 500mV
CH4 10A ?
M2ms
A CH1
11.2V
Figure 29. Optional Power-Up Sequencing Circuit
THERMAL OVERLOAD PROTECTION
Figure 28. Current Limit Hiccup Mode, 20 A Current Limit
The ADP1850 has an internal temperature sensor that senses
the junction temperature of the chip. When the junction
temperature of the ADP1850 reaches approximately 155°C, the
ADP1850 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 ADP1850 resumes
normal operation after the soft start sequence.
Rev. A | Page 15 of 32
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP1850DP-EVALZ | 功能描述:EVAL BOARD FOR ADP1850DP 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 |
| ADP1850SP-EVALZ | 功能描述:EVAL BOARD FOR ADP1850SP 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 |
| ADP1851ACPZ-R7 | 功能描述:电流型 PWM 控制器 w-range input Synch StepDown DC/DC Cntr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| ADP1851-EVALZ | 功能描述:电源管理IC开发工具 Evaluation Board 1.8V 25A Output RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| ADP1853 | 制造商:AD 制造商全称:Analog Devices 功能描述:Synchronous, Step-Down DC-to-DC Controller |
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