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What Are The Lithium Battery Charge Management Chips?
- Aug 24, 2018 -

What are the lithium battery charge management chips? There are too many types of chips. The following is a compilation of nine commonly used lithium battery charging management chip references.

1.SL1053

The linear lithium battery chip SL1053, SL1053 is a circuit designed for high precision linear lithium battery chargers, ideal for low cost, portable chargers.

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The linear lithium battery charging chip SL1053 is a combination of high-precision pre-charging, constant current charging, constant voltage charging, battery state detection, temperature monitoring, low-charge end-of-charge, and charge status indication. It can be widely used in PDAs and mobile phones. , handheld devices and other fields.

The SL1053 determines its state of charge by detecting the battery voltage: precharge, constant current charge, and constant voltage charge. When the battery voltage is less than the threshold voltage VO(MIN), it is in a pre-charge state, and the battery is charged with a small current, and the pre-charge current can be adjusted by an external resistor. After pre-charging, the battery voltage reaches VO(MIN), and enters the fast charging state of constant current charging. The charging current can be adjusted by the peripheral resistance, and the constant current charging causes the battery voltage to rise to a constant voltage charging voltage VO(REG) (generally 4.2V). ). Then enter the constant voltage state of charge, the accuracy of the charging voltage is better than ±1%, in which state, the charging current will gradually decrease, and when the charging current is less than the threshold, the charging ends.

After the charging is completed, the battery voltage will always be monitored. When the battery voltage is less than the threshold VO (RCH), the battery is recharged to the next charging cycle. For safety reasons, the SL1053 uses the internal thermistor of the battery and the appropriate peripheral resistor to monitor the temperature of the battery during the entire charging process, so that the temperature of the battery can be controlled within the range set by the user.

2, TP4056

The TP4056 is a complete single-cell Li-Ion battery with a constant current/constant voltage linear charger. The SOP8 package with heatsink on the bottom and fewer external components make the TP4056 ideal for portable applications. The TP4056 is suitable for USB power and adapter power supplies.

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Due to the internal PMOSFET architecture and anti-reverse charging path, no external isolation diodes are required. Thermal feedback automatically adjusts the charge current to limit chip temperature during high power operation or high ambient temperature conditions. The charging voltage is fixed at 4.2V, and the charging current can be externally set by a resistor. When the charging current drops to the set value of 1/10 after reaching the final float voltage, the TP4056 will automatically terminate the charging cycle.

When the input voltage (AC adapter or USB power) is removed, the TP4056 automatically enters a low current state, reducing the battery leakage current to less than 2uA. The TP4056 can also be placed in shutdown mode when there is a power supply to reduce the supply current to 55uA. Other features of the TP4056 include battery temperature sensing, undervoltage lockout, automatic recharge, and two LED status pins for charging and termination.

TP4056 internal structure block diagram

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3, HL7016

The HL7016 is the first 12V high-voltage input fully integrated switch mode charger in China, which realizes high input voltage and USBOTG boost mode and I2C interface programmable. The chip has built-in voltage, current, temperature and other detection and protection functions. The voltage and current parameters are set and adjusted through the I2C interface to ensure the safety of lithium battery charging. In addition, the chip also has a built-in battery activation function to solve the system crash caused by battery short circuit. Compared with the traditional charging method, the HL7016 reduces the charging time by more than half.

The HL7016 also integrates the USBOTG5V boost output function. When enabled, it can boost the battery voltage to 5.0V output and provide a maximum output current of up to 2.1A, making it ideal for applications such as smartphones, tablets and mobile power supplies.

HL7016 application circuit schematic

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4, CS0301

CS0301 is a high-precision intelligent battery charging management chip with full functions, low price, high integration, simple external circuit and convenient adjustment.

Pin arrangement

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The chip is charged by PWM pulse width modulation. It has three charging modes: turbulence, constant current and constant voltage. It has built-in high-precision sampling circuit, high voltage judgment accuracy, high charge saturation, and various fault protection functions. Reverse leakage current. Small, with different external circuits, can fully meet the charging requirements of lithium ion or lithium polymer batteries.

The chip determines the state of charge by detecting the state of the battery voltage. When the battery voltage is lower than the pre-charge voltage, the chip automatically performs pre-charging; when the battery voltage is higher than the pre-charge voltage and lower than the constant-voltage charging current, the chip begins to charge the battery with constant current, and the charging current is externally adjustable; When the voltage rises above the constant voltage charging voltage, the chip automatically enters constant voltage charging; when the charging current is less than the charging current, the charging ends. When the battery charging port is short-circuited, the chip reduces the charging current and performs short-circuit protection. During the charging process, the chip controls the charging temperature through the thermistor inside the battery. When the battery temperature is higher than the set temperature, the charging is stopped. When the voltage returns to temperature, continue charging.

5, LTH7

The LTH7 (Model: PL4054) is a complete single-cell Li-Ion battery with a constant current/constant voltage linear charger. Its SOT package and fewer external components make the PL4054 an ideal choice for portable applications.

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The PL4054 can be operated with USB power and adapter power. Due to the internal PMOSFET architecture and anti-reverse charging, no external sense resistor isolation diode is required. Thermal feedback regulates the charge current to limit the chip temperature at high power or high ambient temperature conditions. The charging voltage is fixed at 4.2V, and the charging current can be externally set by a resistor. When the charging current drops to the set value 1/10 after reaching the final float voltage, the PL4054 will automatically terminate the charging cycle when the input voltage (AC adapter) When the USB power supply is removed, the PL4054 automatically enters a low current state to reduce the battery leakage current to less than 2uA. The PL4054 can also be placed in a shutdown mode to reduce the supply current by 45uA. Other features of the PL4054 include a charge current monitor, undervoltage lockout, automatic recharge, and a status pin for charging end and input voltage access.

6, CH4054

The CH4054 is a single-cell Li-Ion battery constant current/constant voltage linear charger. The simple external application circuit is ideal for portable device applications. It is suitable for USB power supply and adapter power supply. It has an internal anti-reverse charging circuit and does not require an external isolation diode. Thermal feedback automatically adjusts the charge current to limit chip temperature during high power operation or high ambient temperature conditions.

The CH4054 charge cut-off voltage is 4.2V, and the charge current can be set by an external resistor. When the charging current drops to 1/10 of the set value, the CH4054 will automatically end the charging process. When the input voltage is removed, the CH4054 automatically enters the low current standby state, reducing the standby current to less than 1uA. The CH4054 can also be placed in shutdown mode when there is input power to reduce the operating current to 30uA.

Pin map

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Typical application circuit

7, CN3052A

High-performance linear lithium battery charge management chip CN3052A/CN3052B/CN3056, these devices integrate power transistors, do not need external current sense resistors and blocking diodes, only require few peripheral components, and comply with USB bus specifications The lithium battery can be charged through the USB port, so it is very suitable for various chargers and portable products such as MP4 players, Bluetooth headsets, digital cameras.

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Introduction to the main functions of CN3052A/CN3052B/CN3056

Power Supply Low Voltage Detection (UVLO) The CN3052A/CN3052B/CN3056 has a power supply voltage detection circuit. When the power supply voltage is lower than the power supply voltage low threshold (typically 4.03V), the chip is in the off state and charging is disabled.

Sleep mode CN3052A/CN3052B/CN3056 has a sleep comparator inside. When the input voltage VIN is less than the battery terminal voltage +40mV, the charger is in sleep mode; only when the input voltage VIN rises above the battery terminal voltage of 90mV, the charger can leave sleep. Mode, enters normal working state.

The precharge state is at the beginning of the charge cycle. If the battery voltage is lower than 3V, the charger is in the precharge state, and the charger charges the battery with 10% of the charge current in the constant current charge mode.

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Schematic diagram of the charging process. When the input voltage is greater than the power low voltage detection threshold and the chip enable input is tied high, the CN3052A/CN3052B/CN3056 starts charging the battery, and the CHRG pin outputs a low level, indicating that charging is in progress.

If the battery voltage is lower than 3V, the charger pre-charges the battery with a small current. When the battery voltage exceeds 3V, the charger charges the battery in constant current mode. The charging current is determined by the resistance RISET between the ISET pin and GND. When the battery voltage is close to the battery terminal modulation voltage of 4.2V, the charging current is gradually reduced, and the CN3052A/CN3052B/CN3056 enters the constant voltage charging mode. When the charging current decreases to the charging end threshold, the CHRG terminal outputs a high-impedance state, indicating that the charging cycle is over,and the charging end threshold is 10% of the constant current charging current.

8, SMC401

Pin arrangement

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SMC401SOP16 Foot Package Pin Function Description Table

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The SMC401 is charged in three phases: precharge, constant current charge, and constant voltage charge.

(1) Precharge stage

After installing the battery and adding power, the SMC401 first checks if the battery temperature is within the set range. If it is not normal, it enters the temperature failure mode. Otherwise, the battery voltage VBAT is detected. When the battery voltage VBAT is lower than the low voltage threshold VLOW, the SMC401 is constant. A current of 10% is used to precharge the battery.

(2) Constant current charging stage

When the battery is precharged or the battery voltage VBAT is higher than VLOW and lower than VMAX, the SMC 401 enters a constant current state of charge, at which time the charging current is monitored by the voltage drop across the external sense resistor.

(3) Constant voltage charging stage

When the battery voltage VBAT reaches VMAX, it enters a constant voltage state of charge. The constant voltage accuracy is higher than ±1% over the entire operating temperature and operating voltage range. The charging is stopped when the charging current reaches the termination threshold ILOW, and the constant voltage charging is automatically started when the battery voltage is lower than the recharging threshold voltage VMAX.

9, TP4057

TP4057 A complete single-cell Li-Ion battery charger with battery positive and negative reverse polarity protection with constant current/constant voltage linear control. Its SOT package and fewer external components make it ideal for TP4057 portable applications.

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The TP4057 is suitable for USB power and adapter power supplies. Due to the internal PMOSFET architecture and anti-reverse charging path, no external sense resistors and isolation diodes are required. Thermal feedback automatically adjusts the charge current to limit chip temperature during high power operation or high ambient temperature conditions. The full voltage is fixed at 4.2V, and the charging current can be externally set by a resistor. When the battery reaches 4.2V, the charging current drops to the set value of 1/10, and the TP4057 will automatically terminate charging. When the input voltage (AC adapter or USB power) is removed, the TP4057 automatically enters a low current state with a battery leakage current below 2uA. Other features of the TP4057 include a charge current monitor, undervoltage lockout, automatic recharge, and two status pins that indicate the end of charge and input voltage input.


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