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TL494 KA7500 DC 9V-25V Driver Board DC/DC Converter Inverter Boost Module PWM
This is a very classic design capable of flexible application of TL494 driver module ,it is worth looking forward to the majority of electronics DIY enthusiasts. Be sure to carefully check the size before you buy modules, interfaces and functions to ensure that the application on your target system, then the next one!
Performance description:
Size:. 41.5mm*28mm (PCB), double-sided full glass (FR4) fine KB materials.
Operating voltage: Wide range DC/9V-25V.
Output frequency:31.5KHz (default delivery frequency). The modular design is a double-ended push-pull output, the PWM output frequency is 5 feet 2 independent sawtooth oscillation frequency divider, should be fo '(kHz) = 1.1 / R (kΩ)· C(μF)/2. Changing the timing components Ct, Rt parameters can be easily changed PWM output frequency. R(t) ranges from 1.8~500kΩ, C(t) ranges 4700pF~10μF, the maximum oscillation frequency (fOSC) ≤ 300KHz.
Working state: a power indicator (blue), protection indicator (red).
Applications: Switching Power Supply, DC/DC converters, inverters, electric power systems
Module Interface Description:
PWM2: Module modulated pulse output. TL494 direct output from the modulated pulse (frequency 31.5KHz) by pairing a complementary push-pull amplifier and then output transistor, the output current is large, driving ability, can drive a few kilowatts of power systems.
PWM1: Module modulated pulse output, and PWM2 same frequency (31.5KHz), a phase difference of 180 degrees.
GND: external power supply.
+ VCC:Positive external power supply voltage input, wide operating voltage: (DC/9-25V). This supply-side features a dedicated anti-reverse internal start-up circuit, reverse as long as the supply voltage, the module will not start, to prevent burn module driver IC.
RTH: temperature protection ends, can be accessed by a negative temperature coefficient thermistor or thermostat switches, and power management together with a lock on the heat sink, when the entire power system to meet the design temperature will start protection, protection of the entire system due to the temperature is too high The burning power tube. (Continued 100K thermistor, 75 ℃)
NC: vacant
Feed-: Output negative voltage response loop access terminal to GND when not in use (default connection GND)
Feed +: positive output voltage response loop access terminal and the positive output voltage access to Feed + form a closed loop system, which can adjust the size of the output voltage via potentiometer module.
PRO: module protection signal to trigger end, low trigger protection and protection indicator light. (Short-circuit detection module to an external system, overcurrent, overvoltage signal to start the protective effect immediately in order to protect the entire power system, the specific circuit design by designers free to play!)
REM: input control terminal, control startup and shutdown modules can be directly connected to VCC (default connection VCC)
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