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参数资料
| 型号： | AS7620A EB |
| 厂商： | ams |
| 文件页数： | 10/16页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AS7620 |
| 设计资源： | Design Support Tool |
| 标准包装： | 1 |
| 主要目的： | DC/DC，LDO 步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 5V，3.3V |
| 电流 - 输出： | 500mA |
| 输入电压： | 24V |
| 稳压器拓扑结构： | 降压 |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | AS7620A |
AS7620
Datasheet - D e t a i l e d D e s c r i p t i o n
8.7 Power Fail / Power Good
AS7620A-B monitors input and output voltage by VEPF (pin 11) and V FB (pin 5) respectively. Two dedicated flags PF (pin 10) and PG (pin 12)
are provided outside to inform about early input power fail (active low) and output within regulation. Figure 19 illustrates the typical connection for
VEPF. During start up, PF is initially low. By selecting R3, R4, R5 and R6, it is possible to set the desired input voltage threshold above which the
input power is considered stable. Once V IN (VDDH in Figure 19 ) reaches Vinth, PF is released and so an additional voltage contribution from
V DD is added at the VPF pin, realizing in fact a hysteresis to eliminate PF oscillation due to power supply noise.
Figure 19. Open-Drain Output Stage for Comparator
VDD
1.2…3.6
VDDH
3.6…32V
R6
Power Fail
R3
V REF
-
R ON
INV
+
R4
R5
Table 5 provides the resistors values covering all the standard input BUS. The resistors values are 1% commercial values. It is mandatory to use
the correct resistors values to guarantee the respect of maximum absolute voltages at EPF and PF pin. VDD has been considered 3.3V.
Otherwise EPF pin should be shorted to GND and PF left floating.
Terminology:
VRST: Reset voltage for the EPF. It is 90% of the Input BUS voltage.
VTRIP: Trip voltage for the EPF. It is 80% of the Input BUS voltage.
Table 5. EPF Network Selection with Different Input BUS
V IN (V)
5
6
9
12
15
20
24
28
VRST (V)
4.5
5.4
8.1
10.8
13.5
18
21.6
25.3
VTRIP (V)
4
4.8
7.2
9.6
12
16
19.2
22.5
R3 (K ? )
365
464
768
1070
1370
1870
2260
2670
R4 (K ? )
143
143
140
140
140
140
140
140
R5 (K ? )
1740
1870
2050
2100
2150
2210
2260
2260
R6 (K ? )
1370
1430
1580
1650
1690
1740
1740
1740
8.8 Thermal Protection
The internal junction temperature is continuously monitored. If it reaches 150oC (min), the PMOS is turned off. The device can switch again if the
temperature is decreased by at least 10oC. If the over-temperature persists, the device will be shut down again resulting in a hiccup mode for the
output power.
www.ams.com/DC-DC_Step-Up/AS7620
Revision 1.18
10 - 16
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| AS7620B-BQFT | 功能描述:IC REG BUCK 3.3V 0.5A 12MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:50 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:5 V ~ 25 V 输入电压:2.3 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:600kHz，1.2MHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 包装:管件 供应商设备封装:8-MSOP |
| AS7620BBQFT500 | 制造商:AMS 功能描述:IC STEP-DOWN DC/DC CONVERTER MLPQ-12 制造商:AMS 功能描述:IC, STEP-DOWN DC/DC CONVERTER, MLPQ-12; Primary Input Voltage:24V; No. of Outputs:1; Output Voltage:3.3V; Output Current:500mA; No. of Pins:12; Operating Temperature Min:-40C; Operating Temperature Max:125C; Package / Case:12-MLPQ ;RoHS Compliant: Yes |
| AS7620B-BQFT-500 | 功能描述:IC REG BUCK 3.3V 0.5A 12MLPQ RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| AS7620EB | 制造商:AMS 功能描述:Evaluation Board for AS7620 High Voltage Step-Down Converter |
| AS7620QF_EK_ST | 功能描述:AS7620 - DC/DC, Step Down with LDO 1, Non-Isolated Outputs Evaluation Board 制造商:ams 系列:- 零件状态:有效 主要用途:DC/DC，LDO 步降 输出和类型:1，非隔离 功率 - 输出:- 电压 - 输出:- 电流 - 输出:- 电压 - 输入:3.6 V ~ 32 V 稳压器拓扑:降压 频率 - 开关:- 板类型:完全填充 所含物品:板 使用的 IC/零件:AS7620 标准包装:1 |
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