PTN78000 Wide-Input, Non-Isolated Power Module

Power Modules Ease System Design in Security Cameras - Now Available at Digi-Key

Texas Instruments' PTN78 series wide-input, non-isolated power modules simplify power management designs in security cameras. The diagram in the Overview tab shows a typical power management circuit that is powered by a wall-mount AC/DC adapter. A 24V battery is used to provide emergency backup power. Due to the wide output voltage tolerance of the 24V from the AC/DC adapter, the circuit requires DC/DC modules capable of operating over a wide input voltage range.

The flexible PTN78000, PTN78060 and PTN78020 series of 1.5A, 3A and 6A devices can be used in a wide variety of applications that require input voltages from 7V to 36V. The modules are lead (Pb)-free, and RoHS-compliant, and provide a precisely regulated output voltage that is adjustable via an external resistor. Providing excellent line and load regulation, the modules deliver efficiencies of up to 96%.
Texas Instruments PTN78000 Series Power Module

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PTN78 series modules provide a single regulated output over a wide input voltage range. The modules in this diagram are shown operating from a 24V input. One module provides a 12V output to a motor control circuit for the camera's focus and zoom functions. The other module provides a 3.3V output to a video amplifier and a PTH04070W non-isolated module, (see Related Product tab) which produces a 1.2V output for a DSP's core voltage.

Texas Instruments PTN78 Series Power Modules

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3A, 3.3V/5V Input Adjustable Switching Regulator
The PTH04070W is a highly integrated, low-cost switching regulator module that delivers up to 3A of output current. Occupying less PCB area than a standard TO-220 linear regulator IC, the PTH04070W provides output current at a much higher efficiency and with much less power dissipation, thereby eliminating the need for a heat sink. Their small size (0.5in x 0.4in), high efficiency, and low cost make these modules attractive for a variety of applications.   PTH04070W Datasheet

    •   Up to 3A output current at 85°C
    •   3.3V/5V input voltage and wide-output voltage adjust (0.9V to 3.6V)
    •   160 W/in3 power density
    •   Efficiencies up to 94%
    •   On/Off inhibit
    •   Undervoltage lockout (UVLO)
    •   Output overcurrent protection (nonlatching, auto-reset)
    •   Overtemperature protection
    •   Ambient temperature range: -40°C to 85°C
Texas Instruments PTH04070W Switching Regulator

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Texas Instruments
Part Series
Output Current
High Efficiency
Output Voltage
(2.5V ~ 12.6V) / (11.85V ~ 22V)
PTN78000 Series Datasheet
(2.5V ~ 12.6V) / (11.85V ~ 22V)
PTN78020 Series Datasheet
(2.5V ~ 12.6V) / (11.85V ~ 22V)
PTN78060 Series Datasheet
(0.9V ~ 3.6V)
PTH04070 Series Datasheet