ROHM is expanding its lineup of AC/DC converter ICs. A series of 24 models in all has been prepared, mainly for applications at 25 W or less, enabling simpler design than was possible using previous ICs for the same applications, and satisfying all the requirements demanded of modern AC/DC converters. The high-functionality BM2Pxxx series, with an internal power MOSFET, resolve the issues of AC/DC converter design.
There are 24 models in the BM2Pxxx series lineup. They are made up of combinations of four parameters: "package type", "ON-resistance of internal MOSFET", "AC under voltage protection (BR: brownout)", and "operation with VCC over voltage protection (VCC OVP) enabled". By subdividing the device specifications in this way, an appropriate AC/DC converter can be design in accordance with the output power, footprint, and other application requirements.
| Package | 2 types Surface-mount SOP and through-hole DIP7 |
Select based on power and footprint |
|---|---|---|
| Internal MOSFET ON-resistance | 4 types 1.4Ω/2.4Ω/4.0Ω/8.5Ω |
Select based on power |
| Brown Out (BR) function (AC under voltage protection) |
2 types With and without the function |
Select based on applications |
| VCC Over Voltage Protection (VCC OVP） Operation with enabled |
2 types Latch and auto recovery |
Select based on applications |
The surface-mount SOP8 package devices have achieved an industry-first high power density of 8 W. This was possible because SJ MOSFETs with their low ON-resistances made smaller chip sizes feasible. The ICs of other manufacturers rated at 8 W use DIP7 or DIP8 packages, and so by using the BM2Pxxx series devices in applications at 8 W or lower, footprint can be reduced. In general, applications with low output power levels must be small in size. The BM2Pxxx series enables the engineer to select the IC that is a perfect fit for his application.
The BM2Pxxx series lineup is summarized in the table below.
| BM2PxxxF Series (SOP8) | BM2Pxxx Series (DIP7) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Part # | Ron (Ω) |
Output Power W |
BR | VCC OVP |
Part # | Ron (Ω) |
Output Power W |
BR | VCC OVP |
Part # | Ron (Ω) |
Output Power W |
BR | VCC OVP |
| BM2P051F | 4.0 | ≤8 | ✔ | Latch | BM2P011 | 1.4 | ≤25 | ✔ | Latch | BM2P051 | 4.0 | ≤13 | ✔ | Latch |
| BM2P052F | Auto Restart | BM2P012 | Auto Restart | BM2P052 | Auto Restart | |||||||||
| BM2P053F | Latch | BM2P013 | Latch | BM2P053 | Latch | |||||||||
| BM2P054F | Auto Restart | BM2P014 | Auto Restart | BM2P054 | Auto Restart | |||||||||
| BM2P091F | 8.5 | ≤5 | ✔ | Latch | BM2P031 | 2.4 | ≤19 | ✔ | Latch | BM2P091 | 8.5 | ≤8 | ✔ | Latch |
| BM2P092F | Auto Restart | BM2P032 | Auto Restart | BM2P092 | Auto Restart | |||||||||
| BM2P093F | Latch | BM2P033 | Latch | BM2P093 | Latch | |||||||||
| BM2P094F | Auto Restart | BM2P034 | Auto Restart | BM2P094 | Auto Restart | |||||||||
AC/DC Converter IC with Internal Power MOSFET
- Product Key Points
- Clearing the New Energy Star v. 6.0 Standard
- By using the BM2Pxxx series, conformance to Energy Star, an international standard for energy efficiency, becomes easy…
