AC/DC Drivers - Quasi-Resonant Control type DC/DC Converter IC - BM1Q00XFJ Series

Oct 12, 2026

BM1Q00XFJ series quasi-resonant AC/DC controller IC targets power supplies using an electrical outlet, enabling soft switching to reduce EMI. The design integrates a high-voltage starter circuit for low consumption power and fast startup, and uses burst-mode to lower switching loss and standby power. Built-in protections include soft-start, burst-mode control, cycle-by-cycle over-current limiting, over-load/over-voltage protection, CS open protection with auto-restart, and other safety functions. Key specifications cover VCC 8.9–26.0V and operating temperature -40°C to +85°C.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages29

Reading Time1 h 13 min

AccessFree to download

General Description

Key Specifications

Typical Application Circuit

Features

Package

Applications

Line Up

Electrical Characteristics

Absolute Maximum Ratings

AC/DC Drivers Quasi-Resonant Control type DC/DC Converter IC BM1Q00XFJ Series ●General Description The quasi-resonant controller typed AC/DC converter IC (BM1Q00XFJ series) 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 BM1Q00XFJ series 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 BM1Q00XFJ series 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, BM1Q00XFJ series are highly safety. ●Key Specifications 􀂄 Operating Power Supply Voltage Range: : VCC： 8.9V to 26.0V VH： to 600V 􀂄 Operating Current: Normal： 0.60mA (Typ. ) Burst ： 0.35mA(Typ. ) 􀂄 Max frequency: 120kHz(Typ. ) 􀂄 Operate temperature range: -40℃ to +85℃ ●Typical Application Circuit ●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 􀂄 FB Over Load protection [Auto-restart] 􀂄 CS pin open protection [Auto-restart] ●Package SOP-J8 4.90mm × 3.90mm × 1.65mm (Typ. ) (Typ. ) (Typ. ) ●Applications AC adapters and household appliances (printer, TV, vacuum cleaners, air cleaners, air conditioners, IH cooking heaters etc. ) ●Line Up | IC | VCC OVP | ZT OVP | | --- | --- | --- | | BM1Q001FJ | Auto restart | None | | BM1Q002FJ | Latch | Latch | Fig 1. Application Circuit ○Product structure： Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays [w. ww.rohm.com](w. ww.rohm.com) © 2015 ROHM Co. , Ltd. All rights reserved. TSZ22111 ・ 14 ・ 001 1/25 TSZ02201-0F2F0A200110-1-2 17.JUN.2015 Rev.003 ●Absolute Maximum Ratings（Ta=25􀁱 C） | Item | Symbol | Rating | Unit | Condition | | --- | --- | --- | --- | --- | | Input voltage range 1 | Vmax1 | -0.3 ~ 30 | V | VCC | | Input voltage range 2 | Vmax2 | -0.3 ~ 6.5 | V | CS, FB | | Input voltage range 3 | Vmax3 | -0.3 ~ 7.0 | V | ZT | | Input voltage range 4 | Vmax4 | -0.3 ~ 15 | V | OUT | | Input voltage range 5 | Vmax5 | -0.3 ~ 650 | V | VH | | OUT pin out peak current1 | IOH | -0.5 | A | | | OUT pin out peak current2 | IOL | 1.0 | A | | | ZT pin current1 | ISZT1 | -3.0 | mA | | | ZT pin current2 | ISZT2 | 3.0 | mA | | | Allowable dissipation | Pd | 674.9 (Note1) | mW | | | Operating temperature | Topr | -40 ～ +85 | oC | | | Max junction temperature | Tjmax | 150 | oC | | | Storage temperature range | Tstr | -55 ～ +150 | oC | | (Note1) When mounted (on 70 mm × 70 mm, 1.6 mm thick, glass epoxy on single-layer substrate) . Reduce to 5.4 mW/􀁱 C when Ta = 25􀁱 C or above. ●Operating Conditions（Ta=25􀁱 C） | Parameter | Symbol | Rating | Unit | Conditions | | --- | --- | --- | --- | --- | | Power supply voltage range 1 | VCC | 8.9～26.0 | V | VCC | | Power supply voltage range 2 | VH | 80～600 | V | VH | ●Electrical Characteristics (Unless otherwise noted, Ta = 25􀁱 C, VCC = 15 V) | Parameter | Symbol | Specifications | | | Unit | Conditions | | --- | --- | --- | --- | --- | --- | --- | | | | MIN | TYP | MAX | | | | ［Circuit current］ | | | | | | | | Circuit current (ON)1 | ION1 | - | 600 | 1000 | uA | FB=2.0V
(Switching operation) | | Circuit current (ON)2 | ION2 | - | 350 | 450 | uA | FB=0.5V

FAQs

What operating principle does the BM1Q00XFJ series use to reduce EMI?

It uses a quasi-resonant method that supports soft switching, helping keep EMI low while improving switching behavior.

Which protections are built into the BM1Q00XFJ series?

Built-in functions include soft-start, cycle-by-cycle over-current limiting, over-load protection (auto-restart), over-voltage protection, VCC UV/OV protection, CS open protection (auto-restart), and additional safety controls like burst-mode-related reduction of loss.

What are the main electrical operating ranges for the IC?

The document lists a VCC supply range of 8.9V to 26.0V and an operating temperature range of -40°C to +85°C, with VH supporting up to 600V depending on conditions.

Oct 12, 2026

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