New Japan Radio (New JRC) has provided the operational amplifier NJU77903 for resolver excitation in automotive electric system that realizes the easy resolver design, makes the mounting board or ECU smaller and lighter, and improves the reliability of products.
The resolver exciting circuit is an angle sensor of a motor rotating shaft used for hybrid vehicle and electric vehicle.
General Description
The NJU77903 is the best choice for the resolver excitation of a motor rotating shaft angle sensor used in hybrid vehicle or electric vehicle.
So far combining a plurality of operational amplifiers and transistors have corresponded to high output current requirement on the high voltage and high output current application such as resolver exciting circuit. Therefore, it has complicated the circuit design, increased the size of the mounting board and ECU, and reduced the product reliability, that have caused numerous problems.
The NJU77903 can correspond to the maximum rating voltage 40 V, the operating voltage 36 V, and high output current 200 mAp-p with only one operational amplifier. Moreover the NJU77903 can realize the simple circuit design for the mounting board or ECU and the improvement of reliability.
In addition, the NJU77903's capability of high voltage and high output current are also suitable for bias application in semiconductor test equipment and data transmitting output line driver between the equipment.
New JRC have planned the lineup small package DFN8−W2(ESON8-W2) also for industrial equipment and measuring equipment.
Features
- The operating voltage 36 V,high output current and automotive process are suitable for resolver excitation
The operating voltage 36 V, maximum rating voltage 40 V,high output current 200 mAp-p, and automotive process are suitable for resolver excitation in automotive electric system.
New JRC provides optimal single-chip solution for resolver exciting circuit required these characteristics.
- Contain two protection circuits, a current limit function and a thermal shutdown function
The current limit function for short mode of output terminal and the thermal shutdown function for avoiding NJU77903 burned itself are built in.
- Small size / high heat dissipation leadless package for Industrial equipment and Measuring equipment.
Except for high heat dissipation TO252-5 package, the small size / high heat dissipation leadless package DFN8−W2(ESON8-W2) is also suitable for industrial equipment and measuring equipment.
Furthermore users can freely adjust the current limit values with DFN8-W2 (ESON8-W2) package.
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| Left : TO252-5 Right : DFN8−W2. |
Features and Characteristics
- Wide Operating Voltage (6.8 V to 36 V)
- High output current (±100 mA typ. (200 mApp typ.))
- Wide Operating Temperature (Topr = –40 °C to +125 °C)
- Rail-to-Rail Input / Output
- Enhanced RF noise immunity
- Current Consumption (9.5 mA typ.)
- Open Loop Gain (100 dB typ.)
- Input Bias Current (1 pA typ.)
- Slew Rate (3.5V/µs typ.)
- Unity Gain Frequency (1.5 MHz typ.)
- Thermal shutdown circuit
- Current Limit circuit
- Package Outline (TO252-5, DFN8−W2(ESON8-W2))
Applications
- Angle Resolver
- Motor Driver
- Semiconductor Tester
- Liner Power Booster
