BD7679G
AC/DC用 PWM控制器型 DC/DC转换器IC
BD7679G
AC/DC用 PWM控制器型 DC/DC转换器IC
AC/DC用PWM控制器型DC/DC转换器BD7679G为所有存在插口的产品提供很好的系统。绝缘、非绝缘均可对应，可轻松设计各种形式的低功耗转换器。外接开关用MOSFET及电流检测电阻，可实现自由度高的电源设计。通过峰值电流控制，可进行逐周期电流限制，发挥带宽和瞬态响应的优异性能。BD7679G内置了软启动功能、脉冲串功能、逐周期过电流限制、VCC过电压保护、过负荷保护等各种保护功能。备有外部停止用端子(COMP端子)，可通过外部信号停止开关(OFF)。此功能可用于过热保护及输出过电压保护等。开关频率固定为65kHz。内置跳频功能，有助于实现低EMI。
主要规格
特性：
FB OLP
Auto Restart
BR UVLO
No
External LATCH Function
No
AC Monitor Function
No
VH Terminal UVLO
No
Frequency Reduction Function
No
Current Detection Resistors
External
Over Current Detection Voltage (typ.)[V]
0.5
Dynamic Over Current Detection
No
FET
External
Controller Type
PWM
Vin1(Min.)[V]
8.5
Vin1(Max.)[V]
25
SW Frequency (Max.)[kHz]
65
VCC OVP
Auto Restart
BR PIN
No
Channel
1
Light Load mode
Yes
EN
No
Soft Start
Yes
Thermal Shut-down
Auto Restart
Under Voltage Lock Out
Yes
Operating Temperature (Min.)[°C]
-40
Operating Temperature (Max.)[°C]
85
Package Size [mm]
2.9x2.8 (t=1.25)
特点：
- 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)
