Downlight power box control circuit capable of realizing emergency lighting and general lighting

A downlight power box control circuit capable of realizing emergency lighting and general lighting, comprising:

• a battery;
• a charging module used for charging the battery;
• a logic input module, wherein the logic input module is connected to a mains supply and used for determining whether an input voltage is in conformity with a value;
• if so, a first control signal is generated;
• if not, a second control signal is generated;
• and
• a main control module, wherein in response to the first control signal, the main control module controls a light-emitting element to operate according to a first preset power;
• or,
• in response to the second control signal, the light-emitting element uses the battery as a driving voltage source and operates according to a second preset power;
• wherein an input terminal of the charging module is connected to the mains supply, and an output terminal of the charging module is connected to the battery;
• wherein the charging module comprises a first rectifier bridge, a first transformer, a first resistor, a second resistor and a first triode, an input terminal of the first rectifier bridge is connected to the mains supply, an output terminal of the first rectifier bridge is connected to the first transformer, and the battery is connected to a terminal, away from the first rectifier bridge, of the first transformer;
• wherein, a collector of the first triode is coupled to a first connection point between the first transformer and the battery, an emitter of the first triode is grounded, and a base of the first triode is coupled to the first resistor and the second resistor which are connected in parallel;
• and the main control module comprises a main control chip, and an EN_CH enable pin of the main control chip is coupled to a second connection point between the first connection point and the battery.