Multilevel, online and adjustable overcurrent protection module
A technology of overcurrent protection module and output module, which is applied in the direction of protection reacting to overcurrent, emergency protection circuit device, automatic disconnection emergency protection device, etc., can solve problems such as system malfunction, damage to power supply and load, etc. Accurate overcurrent waveform control, strong adaptability and strong expansibility
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Embodiment 1
[0019] Embodiment 1: Multi-level online adjustable overcurrent protection module, such as figure 1 As shown, it includes an amplification and zero-crossing detection module 1, a protection locking and unlocking module 2, a counter module 3, a time control module 4, a status indication module 5 and an output module 6,
[0020] The amplification and zero-crossing detection module 1 is composed of a programmable gain amplifier PGA, two sets of digital-to-analog converters VDAC and a comparator COMP;
[0021] The protection locking and unlocking module 2 adopts the overcurrent state control register Conrtol_Reg_EN;
[0022] The counter module 3 uses the Ln_COUNER register;
[0023] The time control module 4 is composed of two time controllers Conrtol_reg_L1 (L) (H) and Conrtol_reg_L2 (L) (H);
[0024] Status indication module 5 is a Statusl_Reg register.
[0025] The output terminals of the programmable gain amplifier PGA are respectively connected to the positive pole of the c...
Embodiment 2
[0028] Embodiment 2: The difference from Embodiment 1 is that: 3 groups of digital-to-analog converters VDAC and comparator COMP are used, wherein one group of digital-to-analog converters VDAC and comparator COMP are used for short-circuit protection threshold setting, and the other group of digital-to-analog converters The converter VDAC and comparator COMP group are used for setting the current threshold of multi-level protection, and at the same time, the delay time of protection action can be adjusted through a time controller Conrtol_reg_L1. The connection relationship of each module is the same as that in Embodiment 1.
[0029] The current threshold setting of the short-circuit protection is completed by VDAC8_L2, and the output of VDAC8_L2 is used as the input reference of the comparator COMP_L2. 3 _COUNER, to control the action of the output module and the status indicator module, and complete the short circuit protection function.
Embodiment 3
[0030] Embodiment 3: The difference between this embodiment and Embodiment 1 is that: 5 groups of digital-to-analog converters VDAC and comparator COMP are used, wherein one group of digital-to-analog converters VDAC and comparator COMP are used for short-circuit protection threshold setting, and the remaining Digital-to-analog converter VDAC and comparator COMP group are used for 4-level protection current threshold setting. The time control module 4 is composed of four time controllers Conrtol_reg_L1 (L) (H), Conrtol_reg_L2 (L) (H), Conrtol_reg_L3 (L) (H), and Conrtol_reg_L4 (L) (H). The output of the time controller Conrtol_reg_L1 (L) (H), Conrtol_reg_L2 (L) (H) Conrtol_reg_L3 (L) (H), Conrtol_reg_L4 (L) (H) and the L1, L2, L3, L4 pins of the counter Ln_COUNER register connect. Other module connections are the same as in Embodiment 1.
[0031] The current threshold setting of the short-circuit protection is completed by VDAC8_L2, and the output of VDAC8_L2 is used as the ...
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