GENERAL DESCRIPTION BM6819 is a high Performance current mode PWM+PFM switcher. The BM6819 converter is a wide input range, DC/DC converter which is capable of operation high input voltage up to 200V. It built in HV NPN power transistor and PFM+PWM operation mode results in stable operation over a wide range of supply and output voltage. The BM6819 could work at CCM and DCM mode. The BM6819 converter is special design for portable batteries electronic equipment. FEATURES ■Set-in high-voltage power switch ■VIN voltage 30V DC to 200V DC ■1.00V reference comparator ■PFM+PWM control ■CCM and DCM mode operation ■Excellent line and load regulation ■Few peripheral components ■Set-in Over temperature protection ■Set-in Output Short Protection function ■Set-in Thermal Shutdown function ■isolated flyback, non isolated flyback and Buck converter application APPLICATIONS ■EBIKE Controller Power Supply ■High Voltage Buck Converter ■Portable Electronic Equipment ■Adaptor (for example, travel charger, out power station) TYPICAL APPLICATION VCC GND COMP FB OC IS OC R2 F1 C1 R1 C2 D2 D1 C3 R4 R5 U1 T1 VIN ︳ DC VOUT ︳ DC IS R3 C5 R6 C4 Non isolated Flyback Converter BM6819 Page 1 of 9 BrightMoon Semiconductor Co.,Ltd. Http://www.bmsemi.com Tel: 0755-86531933 Fax: 0755-86531633
Transcript
GENERAL DESCRIPTION BM6819 is a high Performance current mode PWM+PFM switcher. The BM6819 converter is a wide input range, DC/DC converter which is capable of operation high input voltage up to 200V. It built in HV NPN power transistor and PFM+PWM operation mode results in stable operation over a wide range of supply and output voltage. The BM6819 could work at CCM and DCM mode. The BM6819 converter is special design for portable batteries electronic equipment.
FEATURES ■Set-in high-voltage power switch ■VIN voltage 30VDC to 200VDC ■1.00V reference comparator ■PFM+PWM control ■CCM and DCM mode operation ■Excellent line and load regulation ■Few peripheral components ■Set-in Over temperature protection ■Set-in Output Short Protection function ■Set-in Thermal Shutdown function ■isolated flyback, non isolated flyback and Buck
converter application
APPLICATIONS
■EBIKE Controller Power Supply ■High Voltage Buck Converter ■Portable Electronic Equipment ■Adaptor (for example, travel charger, out power
ELECTRICAL CHARACTERISTICS (TA = 25℃, VCC=9.0V, if not otherwise noted)
Parameter Symbol Test Conditions Min Typ. Max UnitOutput Section Max withstanding voltage of the switching tube I_OC=10mA 700 V
Saturation voltage Vsat I_OC=250mA 1 V Output Rise time TR CL=1nF 75 ns Output Fall time TF CL=1nF 75 ns Reference Section Reference Output voltage Vref 0.95 1.00 1.05 V Line Regulation VCC=6.5-9.0V 2 20 mVLoad Regulation IO=0.1-1.2mA 3 % Output noise voltage F=10HZ-10KHZ 50 uA Long Term stability 1000hour@85℃ 5 mV
Oscillator Section Oscillating Frequency F_OSC 55 61 67 KHzVoltage stability VCC=6.5-9V 1 % Temperature stability TA=0-85℃ 1 % Oscillator Amplitude(VPP) 2.2 V PWM Section Maximum Duty Ratio(Note) D_max 53 57 61 %
Minimum Duty Ratio D_min 3.5 %
Power Supply Current Section VCC Startup Current IST VCC=VCC_ON-1V 8.0 10.0 uA VCC Operating Current IOP VCC=8.5V 7.0 8.0 9.0 mAVCC Turn On Threshold VCC_ON VCC Rising 8.0 8.2 8.4 V VCC Turn Off Threshold VCC_UVLO VCC Falling 4.3 4.5 4.7 V VCC Clamp Voltage VCC_CLAMP 1mA 9.0 V Current Sampling Section Current Sampling Threshold Vcs(MAX) VCOMP＞2.0V 0.50 0.60 0.70 V Note: Guaranteed by design.
