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參數(shù)資料
| 型號： | AMS4122S |
| 廠商： | Advanced Monolithic Systems, Inc. |
| 英文描述： | SINGLE 4A/DUAL 2A BUCK CONVERTER IN SO8 |
| 中文描述： | 單4A/DUAL甲BUCK變換器采用SO8 |
| 文件頁數(shù)： | 2/6頁 |
| 文件大小： | 542K |
| 代理商： | AMS4122S |
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723
AMS4122
PIN DESCRIPTION
Pin Number
NAME
DESCRIPTION
1
SW2
This connects the inductor the Internal Switch2
2
PVIN SW2
Input Power Pin for SW2 from unregulated power supply
3
GND
Ground Pin connected to PCB ground plane. This pin is also the ground for internal
voltage reference.
4
F/B2
Feedback2. A resistor network of two resistors is used to set-up the output voltage
connected between Output2 to GND. The node between the two resistors is connected to
Feedback2 pin. In Two Phase Mode F/B2 should be connected to a voltage 2.5V or
higher
5
F/B1
Feedback1. A resistor network of two resistors is used to set-up the output voltage
connected between Output1 to GND. The node between the two resistors is connected to
Feedback1 pin.
6
EN
Enable. A voltage greater than 2.5V at this pin enables both devices operation.
7
PVIN SW1/AVIN
Input Power Pin for SW1 and Analog Input Voltage that powers up the chip
8
SW1
This connects the inductor the Internal Switch1
RECOMMANDED OPERATING CONDITIONS:
The minimum input voltage should be 4.5V, however the device will
function as low as 4.0V. The maximum operating voltage should be 16V, the device will work at 17V but the switching loss is
higher. The best performance is at 1.5A output load per channel; however it works well with 2A load per channel. The minimum
supply voltage is Vout +1Vfor 1A load and Vout +1.1V for 2A load but higher than 4.0V. There is an internal UVLO that will
turn off the device if the input voltage is below 4.0V. When the input voltage exceeds 12V the output load current should be
maintain below 1.5A, due to switching loss the device will have lower performance.
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