Design of laser projection lamp scheme PCBA development of MOS voltage detection IC based on single chip microcomputerIn 2018, the ultra-low power linear regulator chip ly2514 series LDO was launched.
Design of laser projection lamp scheme PCBA development of MOS voltage detection IC based on single chip microcomputer
In 2018, the ultra-low power linear regulator chip ly2514 series LDO was launched. It is an ultra-low power, low dropout and linear regulator manufactured by CMOS process. Ly2514 series voltage regulator consumes about 0.7ua of current, and the power consumption after enabling shutdown is 0.01ua. Ly2514 has built-in enabling control, current limiting circuit and turn back short-circuit protection, and has the function of enabling to control the automatic discharge of output capacitor. Features: 1. Input / output voltage difference: 160mv ＠ IOUT ＝ 100mA (3.3V) 2. High output current: 300mA 3. Output voltage range: 1.8v-5.0v 4. High precision: ± 2% 5. Input voltage range: 2.5v-18v 6. Ultra low static current: 0.7ua (typical) sleep: 0.01ua (typical) 8. Thermal shutdown: 160 ℃ 9. Current protection: turn back short-circuit current 30m and overcurrent protection 10, Package form: sot-89-3, sot-23-5, application: communication tools, portable equipment, mobile phone, handheld game console, digital camera, power supply of lithium battery products
Lyo2514c15m package msot23-5l Withstand Voltage 18V output voltage 1.5V
Lyo2514c18m package msot23-5l Withstand Voltage 18V output voltage 1.8V
Ly2514c25m package msot23-5l Withstand Voltage 18V output voltage 2.5V
Ly2514c30m package msot23-5l Withstand Voltage 18V output voltage 3V
Lyo2514c33m package msot23-5l Withstand Voltage 18V output voltage 3.3V
Ly2514c33n6g package DFN Withstand Voltage 18V output voltage 3.3V
Lyo2514c45m package msot23-5l Withstand Voltage 18V output voltage 4.5V
Ly2514c50m5 package msot23-5l Withstand Voltage 18V Output Voltage 5V
Ly5156 reverse connection protection short circuit protection at the output of lithium battery charging IC chip reduces the power supply current to 0 current: the sop8 package with heat sink at the bottom and less number of external components make ly5156 an ideal choice for portable applications.
Ly5156 can work with USB power supply and adapter power supply.
Due to the internal PMOSFET architecture and anti backcharge circuit, no external isolation diode is required.
Thermal feedback can automatically adjust the charging current to adjust the chip temperature under high-power operation or high ambient temperature conditions
Limit it. The charging voltage is fixed at 4.2V and the charging current can be set externally through a resistor. When charging
When the current drops to 1 / 10 of the set value after reaching the final floating charge voltage, ly5156 will terminate the charging cycle.
When the input voltage (AC adapter or USB power supply) is removed, ly5156 automatically enters a low current state
State, reduce the battery leakage current below Lua. Ly5156 can also be placed in shutdown mode when there is power supply to supply power
Other features of the current drop to 55uao ly5156 include undervoltage locking, automatic recharging and two LED status pins to indicate charging and end.
Reverse connection protection function of positive and negative electrodes of lithium battery;
Short circuit protection at the output end reduces the power supply current to 0:
Input power voltage overvoltage protection;
Charging status dual output, no battery and fault status display
C / 10 charging termination
The supply current in standby mode is 55ua
2.9v trickle
Sop8 package.
Overview ly4059a is a 3A lithium ion battery charger for 5V AC adapter. It is a synchronous step-down converter with a fixed frequency of 800KHz, so it has a charging efficiency of more than 92% and its own calorific value is very small. Ly4059a includes a complete charging termination circuit, automatic recharging and a 4.2V preset charging voltage with an accuracy of ± 1%. It is internally integrated with anti backflow protection, output short circuit protection, chip and battery temperature protection and other functions. Ly4059a adopts sop8 package with heat sink and requires only a few peripheral components. Therefore, it can be embedded in various handheld applications as a charger for high-capacity batteries.
features
■ 800KHz fixed switching frequency
■ up to 92% output efficiency
■ large 2A adjustable output current
■ adjustable output voltage
■ no need for high precision milliohm resistors
■ no anti backflow current diode required
■ no external power MOS tube or freewheeling diode is required
■ 4.2V charging voltage with accuracy of ± 1%
■ charging state dual output, no battery and fault status display
■ the supply current in standby mode is 70ua
■ 2.9v trickle charging
■ soft start limits surge current
■ battery temperature monitoring function
■ output short circuit protection function
■ 8-pin SOP package
Large rated value
■ input power supply voltage (VCC): - 0.3V ~ 6.5V
■ BAT：-0.3V~7V
■ LX：-0.3V~7V
■ PROG：-0.3V~7V
■ NCHRG：-0.3V~7V
■ NSTDBY：-0.3V~7V
■ TS：-0.3V~7V
■ bat short circuit duration: continuous
■ large junction temperature: 145 ℃
■ working environment temperature range: - 40 ℃ ~ 85 ℃
■ storage temperature range: - 65 ℃ ~ 125 ℃
■ pin temperature (welding time: 10 seconds): 260 ℃
