PWM Control Type DC/DC Converter IC for AC/DC Driver - BD7679G

BD7679G is a PWM controller type DC/DC converter IC for AC/DC that provides an optimum system for all products that requires an electrical outlet. This product supports both isolated and non-isolated devices. IC enables simple design of low-power electrical converters. With switching MOSFET and current detection resistor as external devices, it enables more freedom in design. Since the peak current control is utilized, peak current is controlled in each cycles, application excels wide bandwidth and transient response. BD7679G includes various protective functions such as soft start function, burst function, per-cycle over current limiter, VCC overvoltage protection and overload protection. An external stop pin (COMP pin) is provided, so that switching stopping can be set by external signals. The function is available as overheating protection and over voltage protection of secondary output, so on. The PWM switching frequency is fixed at 65 kHz. A frequency hopping function is included which contributes to low EMI.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
número de peça
Estado de Condição
Quantidade Unidade
Quantidade mínima Package
tipo de embalagem
BD7679G-GTR Active SSOP6 3000 3000 Taping sim
Controller Type PWM
Vin1(Min.)[V] 8.5
Vin1(Max.)[V] 25.0
SW frequency(Max.)[KHz] 65.0
Vcc OVP Auto Restart
Channel 1
Light Load mode Yes
Soft Start Yes
Thermal Shut-down Yes
Under Voltage Lock Out Yes
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
    • PWM frequency of 65kHz
    • PWM current mode method
    • Low circuit current when UVLO is ON (12µA at VCC=12V)
    • Low circuit current without load (Burst operation when load is light)
    • Built-in SW frequency hopping function
    • 250ns leading-edge blanking
    • VCC UVLO / OVP (Auto restart)
    • Per-cycle over current protection circuit
    • Soft start
    • Output overload protection (Auto-restart protection)
    • External stop function for COMP pin (Auto restart)

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Dados técnicos
Thermal Resistance

The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.