BM1Q021FJ
Quasi-Resonant Control type DC/DC Converter IC

The quasi-resonant controller typed AC/DC converter IC BM1Q021FJ provides an optimum system for all products that include an electrical outlet. Quasi-resonant operation enables soft switching and helps to keep EMI low. With MOSFET for switching and current detection resistors as external devices, a higher degree of design freedom is achieved. As BM1Q021FJ built in HV starter circuit, it contributes to low consumption power and high speed start. Because the built-in burst mode is reduced switching loss and IC consumption current is low, Stand-by power is very low. Because BM1Q021FJ built-in soft-start, burst mode, over current limiter which is cycle-by-cycle, over load protection, over voltage protection, CS open protection and so on, BM1Q021FJ are highly safety.

Data Sheet Buy * Sample *
* This is a standard-grade product.
For Automotive usage, please contact Sales.

Product Detail

 
Part Number | BM1Q021FJ-E2
Status | Recommended
Package | SOP-J8
Unit Quantity | 2500
Minimum Package Quantity | 2500
Packing Type | Taping
RoHS | Yes

Specifications:

Frequency Reduction Function

Yes

Current Detection Resistors

External

Dynamic Over Current Detection

No

FB OLP

Auto Restart

ZT OVP

Auto Restart

BR UVLO

No

External LATCH Function

No

AC Monitor Function

No

VH Terminal UVLO

No

FET

External

Controller Type

QR

Vin1(Min.)[V]

8.9

Vin1(Max.)[V]

26.0

Withstand Voltage [V]

650

SW Frequency (Max.)[kHz]

120.0

VCC OVP

Auto Restart

BR PIN

No

Channel

1

Light Load mode

Yes

EN

No

Soft Start

Yes

Thermal Shut-down

Yes

Under Voltage Lock Out

Yes

Operating Temperature (Min.)[°C]

-40

Operating Temperature (Max.)[°C]

105

Features:

  • Quasi-resonant method
  • Built-in 650V tolerate start circuit
  • Low power when load is light ( Burst operation)
  • Maximum frequency control (120kHz)
  • Frequency reduction function
  • AC voltage correction function
  • VCC pin : under voltage protection
  • VCC pin : overvoltage protection
  • Over-current protection (cycle-by-cycle)
  • OUT pin : H voltage 12V clamp
  • Soft start
  • ZT trigger mask function
  • ZT Over voltage protection[Auto-restart]
  • FB Over Load protection [Auto-restart]
  • CS pin open protection [Auto-restart]

Design Resources

 

Technical Articles

Schematic Design & Verification

  • Importance of Probe Calibration When Measuring Power: Deskew
  • Impedance Characteristics of Bypass Capacitor

Thermal Design

  • Method for Calculating Junction Temperature from Transient Thermal Resistance Data
  • Thermal Resistance

Tools

2D/3D/CAD

  • SOP-J8 Footprint / Symbol
  • SOP-J8 3D STEP Data

Packaging & Quality

Manufacturing Data

  • Factory Information

Environmental Data

  • REACH SVHC Non-use Declaration