BD28C57HFJ-LB (新产品)
PWM Types DC/DC Converter IC
BD28C57HFJ-LB (新产品)
PWM Types DC/DC Converter IC
This product is a rank product for the industrial equipment market. This is the best product for use in these applications. The PWM type DC/DC converter for AC/DC provides an optimal system for all products that require an electrical outlet. This IC supports both isolated and non-isolated devices and enables simpler designs of various types of a low power consumption electrical converters. This IC has a lineup of VDD UVLO that support both Si and SiC of MOSFET. Power supplies can be designed flexibly by connecting a current detection resistor for the switching externally. Current is restricted in each cycle and excellent performances are demonstrated in a bandwidth and transient response since a current mode control is utilized. The switching frequency can be set by external resistor and capacitor on the RTCT pin.
主要规格
特性：
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]
1
Dynamic Over Current Detection
No
FET
External
Controller Type
PWM
Vin1(Min.)[V]
6.9
Vin1(Max.)[V]
28
SW Frequency (Max.)[kHz]
500
BR PIN
No
Channel
1
Light Load mode
Yes
EN
No
Thermal Shut-down
Yes
Under Voltage Lock Out
Yes
Operating Temperature (Min.)[°C]
-40
Operating Temperature (Max.)[°C]
125
Package Size [mm]
4.9x6 (t=1.65)
特点：
- PWM Current Mode Method
- Low Power Consumption
- The VDD Pin UVLO Function
- Over Current Protection Function per Cycle
- Switching Frequency Setting Pin
Reference Design / Application Evaluation Kit
-
- Evaluation Board - BD28C57HFJ-EVK-001
This evaluation board outputs an isolated voltage of 24 V from an input of 300 VDC to 900 VDC, and the maximum output current is 2 A. A SiC MOSFET (SCT12H12NZ) with 1700 V, RdsON = 1.1 Ω typ is used so that an input voltage of up to 900 VDC can be applied. The control IC used is the BD28C57HFJ, which is suitable for driving SiC MOSFET. The control method is current mode. The oscillation frequency is approximately 65 kHz, and the duty max is 50%.
