US90AEVK Electronic IC Chips power ic chip 24V Hall IC Fan Driver
electronic integrated circuit
,linear integrated circuits
US90A / US91A
24V Hall IC Fan Driver
Features and Benefits
- Low cost
- High sensitivity Hall Sensor
- Locked rotor protection and auto-restart
- Power-efficient CMOS and power MOSFETs
- Built-in output protection clamping diode
- Integrated tachometer (US90A) or alarm (US91A) signal output
- 2-coil fan driver with FG/RD output in 4-pin VK / VA and 8-pin narrow SOIC packages (all RoHS Compliant)
Application Examples
- 12V/24V fans
- Peak current up to 500mA
General Description
The US90A/91A is a one-chip solution for driving two-coil brushless DC cooling fans.
Based on the advanced Melexis CMOS process, the IC contains a Hall-effect sensor, dynamic offset correction and low side output drivers.
Frequency Generator or Rotation Detection is available. The open-drain output makes the connectivity with any external interface such as hardware monitoring or Super I/O IC easier.
These features are combined with the Melexis patented no-VDD design to fit the IC in small 4-pin VK and VA package. The device is also delivered in DC package for automatic assembly.
Absolute Maximum Ratings
| Parameter | Symbol | Value | Units |
| Fan Supply Voltage | VDD | 30 | V |
| Peak Output Current | IOUTp | 500 | mA |
| Continuous Output Current | IOUTc | 250 | mA |
| FG / RD Output Current | IFG (RD) | 20 | mA |
| Operating Temperature Range | TA | -40 to 85 | °C |
| Junction Temperature | TJ | 125 | °C |
| Storage Temperature Range | TS | -55 to 150 | °C |
| Magnetic Flux Density | B | Unlimited | mT |
Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximumrated conditions for extended periods may affect device reliability.
Functional Diagram
Stock Offer (Hot Sell)
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| TMMBAT48FILM | 80000 | ST | 16+ | LL34 |
| LTM8020EV | 944 | LINEAR | 12+ | LGA |
| SI7021-A10-GMR | 2807 | SiliconLa | 13+ | LGA |
| SIM28 | 854 | SIMCOM | 16+ | LGA |
| SIM800 | 1082 | SIMCOM | 15+ | LGA |
| PSMN5R5-60YS | 13092 | 11+ | LFPAK56 | |
| PSMN4R1-30YLC | 12908 | 13+ | LFPAK | |
| 17-21SURC/S530-A2/TR8 | 17528 | EVERLIGHT | 15+ | LED |
| LTST-C235KGKRKT | 14684 | LITEON | 16+ | LED |
| SML-LX0603GW-TR | 69000 | LUMEX | 13+ | LED |
| SML-710MWT86 | 27000 | ROHM | 07+ | LED |
| SML-D12Y8WT86-SQ | 240000 | ROHM | 13+ | LED |
| SKKH323/16 | 323 | SEMIKRON | 16+ | IGBT |
| STK433-870 | 716 | SANYO | 16+ | HYB-23 |
| SI-7230M | 497 | SANKEN | 16+ | HYB-20 |
| STK4050II | 1136 | SANYO | 13+ | HYB-18 |
| STK350-030 | 1241 | SANYO | 16+ | HYB-15 |
| STK403-040-E | 1460 | SANYO | 05+ | HYB-12 |
| SI-7300A | 683 | SANKEN | 14+ | HYB |
| STK402-071N | 1127 | SANYO | 16+ | HYB |
| STK403-030 | 1133 | SANYO | 14+ | HYB |
| STK404-130S | 1463 | SANYO | 14+ | HYB |
| STK412-170 | 623 | SANYO | 16+ | HYB |
| STK412-240 | 1103 | SANYO | 16+ | HYB |
| STK413-430-E | 1148 | SANYO | 16+ | HYB |
| STK4192II | 1244 | SANYO | 16+ | HYB |
| STK4277 | 830 | SANYO | 14+ | HYB |
| STK433-070-E | 1013 | SANYO | 09+ | HYB |
| STK443-050 | 1331 | SANYO | 16+ | HYB |
| STK795-811A | 965 | SANYO | 08+ | HYB |
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