Power management IC is a product that plays an important role in many occasions. As one of the main components of many key circuit structures, it determines whether the product can operate normally to a certain extent. Therefore, it is of great significance to choose a suitable power management IC. As for similar products on the market, it may be difficult for users to distinguish, especially for friends who do not have relevant professional knowledge, it is very troubling. Today, the introduction is the power management IC brand price examples and functional advantages.
First, introduction of power management IC
1. Introduction
IC, that is, integrated circuit is the use of semiconductor production process, in a small piece of monocrystalline silicon wafer production of many transistors and resistors, capacitors and other components, and in accordance with the multi-layer wiring or tunnel wiring method to combine components into a complete electronic circuit. It is represented in the circuit by the letter “IC” (also using the word symbol “N”, etc.).
The LY4054 is a complete single lithium-ion battery constant current constant voltage linear charging IC. It comes in a minimal SOT-23-5 package that requires very few external components, making it truly suitable for portable applications. Moreover, the LY4054 is specifically designed for USB power features. The LY4054 can also be used as a standalone linear lithium-ion battery charger.
Because it has a complete internal MOSFET architecture, it does not need any external induction resistors and diodes. When operating in high power load or high temperature environment, the thermal feedback will automatically control the charging current, thus controlling the temperature of the chip. The charging voltage is fixed at 4.2V and the charging current is set by connecting to a resistor. When the charging voltage reaches the full charge voltage and the charging current drops to 1/10 of the set current value, the AP8054 will automatically stop charging.
When the power supply (general power adapter or USB power supply) is removed, the AP8054 automatically enters a low current mode where the battery current is less than 2uA. The LY4054 can also enter a switch-off mode in which the supply current is reduced to 25uA.
Other features include charge current monitoring, low-voltage switching off, automatic recharging, and a status pin to indicate when charging is complete or if an external power source is connected
2. Characteristics
The charging current is programmable, up to 800mA.
No external mosFeTs, induction resistors, and diodes.
Constant current and constant voltage charging with overtemperature protection enables faster charging without fear of overheating.
Single lithium-ion battery can be charged directly from USB port.
Preset 4.2V charging voltage, accuracy up to ±1%.
The off mode requires only 25uA support current.
Trickle charging interval value 2.9V.
No trickle charging mode can be set.
Soft start, can effectively limit impulse current.
Sot 23-5 patch small package.
Two, power management ic chip manufacturers price example
1, integrated circuit (IC)RM6203
The current price is 0.34 yuan/piece
2. Shenzhen Electronic Components Manufacturer XL2005
The current price is 0.9 yuan per piece
3, high energy efficiency power management IC chip PR681
The current price is 0.1 yuan/piece
1.Buck non-isolated circuit architecture, matt coupling and transformer, saving cost.
2.RF1 is a wire-wound resistor with a fuse function in case of disaster failure and a surge current limiting function.
3.D1, C1, L1, C2 half-wave rectifying and filtering elements.
4. The VDD operating range is 9V~22V. It is recommended that the voltage of the auxiliary winding be set at 12V. To prevent undervoltage protection or overvoltage protection.
5. The regulating circuit is composed of ZD1, C5 and D3.
About power management IC, there are a lot of similar products on the market, they have a large difference in pricing and sales positioning and user actual use evaluation performance and so on several plates, the above listed information is from the actual situation to make a professional introduction, including a brief introduction to the principle of power management IC and functional advantages, and for many user needs, Xiaobian also lists for you the market sales reputation is very good power management IC products as a reference.
