Linear Technology Corporation introduces the LTM9100 μModule® (micromodule), all-in-one Isolated Anyside™ switch controller protects and monitors high voltage DC power supplies up to 1000 V. High voltage supplies used in industrial, datacom, avionic and medical applications require a controlled turn-on, with isolation needed for control circuit protection, operator safety and breaking ground paths. Alternative relay-based or discrete solutions are bulky, complex, component-intensive and lack safety certifications. The innovative LTM9100 saves design time, certification effort and board area by wrapping all the needed functionality, including isolated power and digital telemetry, in a compact BGA package.
A 5 kVRMS galvanic isolation barrier inside the LTM9100 separates the digital interface from the switch controller, driving an external N-channel MOSFET or IGBT switch. To guarantee a robust isolation barrier, the controller is production-tested to 6 kVRMS and will be recognized by the component-level UL 1577 standard, saving months of certification time for the end equipment manufacturer. Isolated digital measurements of load current, bus voltage and temperature are accessed via the I2C/SMBus interface, enabling power and energy monitoring of the high voltage bus.
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| Isolated High Side Load Switch Driver. |
Due to its isolated nature, the LTM9100 is easily configured for high side, low side (ground return) and floating applications. Inrush current is minimized by soft-starting the load, and the supply is protected from overload and short-circuits with a current-limited circuit breaker. The LTM9100 is versatile enough to control inrush current in hot-swappable cards, AC transformers, motor drives and inductive loads. Adjustable undervoltage and overvoltage lockout thresholds ensure that the load operates only when the input supply is in its valid range. A fully integrated DC/DC converter, including the transformer, powers the isolated switch control side.
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| 270 V Load Soft-Start. |
Specified over the −40 °C to 105 °C temperature range, the LTM9100 is offered in a 22 mm × 9 mm × 5.16 mm BGA package, with 14.6 mm of creepage distance between the logic side and the isolated side. 1,000-piece pricing starts at $19.45 each. Device samples and evaluation circuit boards are available online or from your local Linear Technology sales office.
Summary of Features: LTM9100
- Controls N-Channel MOSFET or IGBT Switch
- Galvanically Isolated Switch Control
- 5 kVRMS for 1 Minute (UL 1577 Recognition Pending)
- 690 VRMS (1000 VDC) Continuous Working Voltage
- > 30 kV/μs Common Mode Transient Immunity
- ±20 kV HBM ESD Across Barrier
- 10-Bit ADC Measures Load Current & Two Voltage Inputs
- I2C/SMBus Interface for Configuration & Data Readback
- Adjustable Soft-Start Rate & Circuit Breaker Threshold
- Internal Isolated DC/DC Power Supply
- Undervoltage & Overvoltage Lockout
- Independent 3 V to 5.5 V Logic Supply
- Low < 10 μA Shutdown Mode
- Fault Alert & Power Good Outputs
- 22 mm × 9 mm × 5.16 mm BGA Package with 14.6 mm Creepage
