Overview: CN300 is an integrated circuit that integrates undervoltage protection and current detection comparators. The chip includes a current detection comparator, a power undervoltage comparator, a voltage reference source, and a timer circuit unit. It is very suitable for overcurrent protection, current detection, or battery discharge management applications, and has the characteristics of low power consumption, simple and flexible application. When the power supply voltage drops below the undervoltage threshold (typical value 2.75V) and lasts for 100 milliseconds, CN300 enters the undervoltage state, outputs a high level at the OD pin and a low level at the pin. Only when the power supply voltage is higher than the undervoltage threshold by 0.33V and lasts for 100 milliseconds, CN300 recovers from the undervoltage state, outputs a low level at the OD pin, and a high level at the pin. When the voltage difference between the current detection positive input terminal CSP pin and the current detection negative input terminal CSN pin is greater than the overcurrent detection threshold (typical value 38mV) and lasts for more than 9 milliseconds, it enters the overcurrent state, and CN300 outputs a high level at the OD pin and a low level at the pin. Undervoltage state or overcurrent state is collectively referred to as over-discharge state. CN300 is very suitable for overcurrent protection, current detection, and discharge management of three nickel-hydrogen batteries or a single lithium battery. CN300 uses a 6-pin SOT-23 package.

Product Parameters

Main Functions: Undervoltage protection, overcurrent protection/current detection comparator integrated circuit

Output Voltage Range: 1.1V-6.5V

Input Voltage Range: 1.1V-6.5V

Current Detection: Yes

Operating Current: 4uA@VCC=3V

Package Type: SOT23-6

Detection Threshold : Undervoltage: 2.75V

Threshold Accuracy: Voltage Threshold: ±1%

Delay: 100ms

Applications:

l  Overcurrent protection

l  Current detection comparator

l  Three-cell NiMH battery discharge management

l  Single-cell lithium battery discharge management

Features:

l  Low operating current: 4uA@VCC=3V

l  Fixed undervoltage threshold inside the chip

l  Maintains effective output when VCC is as low as 1.1V

l  Undervoltage threshold: 2.75V (power voltage drop)

l  Undervoltage threshold accuracy: ±1%

l  Undervoltage detection debounce delay: 100 milliseconds

l  Overcurrent detection threshold: 38 millivolts

l  Overcurrent detection input common mode voltage range:
0V to VCC

l  Overcurrent detection debounce delay: 9 milliseconds

l  Low-active and high-active overdischarge outputs

l  CMOS output

l  Uses SOT-23-6 package

l  Operating temperature range: –40°C to +85°C

l  Lead-free product, RoHS compliant, halogen-free