Introduction to the stable and reliable domestic power supply chip - IS6607A
In order for the corresponding country to be independent and controllable and not to be restricted by foreign countries, in addition to the vigorous development of domestic CPUs, it is equally important to realize the localization of other devices; the previous article Yu Jinglong has introduced to you a domestic power chip IS6605 (
1pin: BST, connected to the PHASE signal through a capacitor;
2pin: AGND, the logical GND of the signal, connected to PGND through an 0R resistor;
3pin: CS, the control pin of the current limit pin, connect a resistor to AGND, if the current exceeds this value
, the output will be turned off to achieve protection;
4pin: MODE, pass a resistor to GND, select different switching frequencies through different resistors;
5pin: REF, output voltage tracking Reference signal;
6pin: RTN, negative feedback signal, connected to the GND end of the remote output voltage filter capacitor, and working together with the positive feedback to be differential;
7pin: FB: positive feedback signal, connected to the remote output voltage filter capacitor Positive terminal, together with negative feedback, is differential;
8pin: EN, enable signal, connected to external control signal, low-level chip does not output voltage, high-level chip outputs voltage;
9pin: PGOOD, when the output voltage is normal , output high level;
10pin and 21pin: VIN, the pin connected to the input voltage, filter capacitors of different sizes need to be placed in front of the pins;
11~18pin: PGND, system ground, need to be connected to AGND through a 0R resistor;
19PIN , VCC, an internal LDO outputs a voltage of 3.3V;
20pin: PHASE, the output point of the switching frequency, the point connected to the inductor ;
pin definition is introduced, let’s take a look at the internal block diagram of the chip:
IS6607A After the content is introduced, let’s take a look at the typical application diagram:
Let’s share a specific case with you. If you have students who use IS6607A chips at work, the following picture can be used as a reference;
Note:
1, this circuit configuration is VIN= 12V, VOUT=5V.
2 and PGOOD are fault indication pins. When PG is set low, it means that there is an abnormality in the chip (the abnormality includes chip UV, OV, OC, OT, etc.). If the fault indication function is not needed, the R2 resistor can be left uninstalled. PGOOD Hanging.
3 and EN are chip enable terminals and can be connected to external enable signals. If there is no external enable signal, the VIN=12V voltage source can be directly divided to 3V through two voltage dividing resistors and connected to the EN pin.
4, this circuit is configured in Hiccup mode. When the chip encounters protection, it will stop for 9ms and then restart directly.
5, the circuit setting mode is Skip Mode 800KHz.
has introduced so much, I think everyone has a certain understanding of IS6607A. In addition to the 6A output current, Changgong Micro also has the IS6607A that can output 20A current, as well as 8 power supplies used on the server CPU, with a maximum capacity of 240A. Next This article introduces to you;
Judging from the current usage, Changgong Micro’s power supply solution can basically meet the various power requirements on the motherboard, and is relatively stable. Judging from the current domestic independent and controllable trend, Yujinglong It is believed that Changgong Micro Power Supply must be worthy of a big task.
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Original: Wolonghui Yujinglong
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