Overview
The MDC3105DMT1G, produced by onsemi, is an integrated relay and inductive load driver designed to replace multiple discrete components with a single surface-mount technology (SMT) part. It is available in an SC-74 package and is optimized for switching 3 to 6 Vdc inductive loads such as relays, solenoids, incandescent lamps, and small DC motors. This device simplifies system design by eliminating the need for a free-wheeling diode and provides robust transient isolation and low input drive current.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Power Supply Voltage | VCC | - | - | 6.0 | Vdc |
| Input Voltage | Vin(fwd) | - | - | 6.0 | Vdc |
| Reverse Input Voltage | Vin(rev) | -0.5 | - | - | Vdc |
| Junction Temperature | TJ | - | - | 150 | °C |
| Operating Ambient Temperature Range | TA | -40 | - | 85 | °C |
| Storage Temperature Range | Tstg | -65 | - | 150 | °C |
| Output Sink Current - Continuous | IO | - | - | 500 | mA |
| Output Saturation Voltage | VO(sat) | 0.12 | - | 0.16 | Vdc |
| Input Bias Current | Iin | 0.8 | - | 1.6 | mAdc |
Key Features
- Provides a robust driver interface between DC relay coil and sensitive logic circuits.
- Optimized to switch relays from a 3.0 V to 5.0 V rail.
- Capable of driving relay coils rated up to 2.5 W at 5.0 V.
- Features low input drive current and good back-to-front transient isolation.
- Internal Zener clamp eliminates the need for a free-wheeling diode and routes induced current to ground for quieter system operation.
- Guaranteed off state with no input connection.
- Supports large systems with minimal off-state leakage.
- ESD resistant in accordance with the Class 1C Human Body Model.
- Low saturation voltage reduces system current drain by allowing the use of higher resistance relay coils.
- Pb-free and halide-free packaging.
Applications
- Telecom: Line cards, modems, answering machines, FAX machines, feature phone electronic hook switch.
- Computer and Office: Photocopiers, printers, desktop computers.
- Consumer: TVs and VCRs, stereo receivers, CD players, cassette recorders, TV set-top boxes.
- Industrial: Small appliances, white goods, security systems, automated test equipment, garage door openers.
- Automotive: 5.0 V driven relays, motor controls, power latches, lamp drivers.
Q & A
- What is the MDC3105DMT1G used for?
The MDC3105DMT1G is used to switch 3 to 6 Vdc inductive loads such as relays, solenoids, incandescent lamps, and small DC motors.
- What package is the MDC3105DMT1G available in?
The MDC3105DMT1G is available in an SC-74 package.
- What is the maximum power supply voltage for the MDC3105DMT1G?
The maximum power supply voltage is 6.0 Vdc.
- Does the MDC3105DMT1G require a free-wheeling diode?
No, the MDC3105DMT1G has an internal Zener clamp that eliminates the need for a free-wheeling diode.
- What is the maximum output sink current for the MDC3105DMT1G?
The maximum output sink current is 500 mA.
- Is the MDC3105DMT1G ESD resistant?
Yes, the MDC3105DMT1G is ESD resistant in accordance with the Class 1C Human Body Model.
- What are the operating temperature ranges for the MDC3105DMT1G?
The operating ambient temperature range is -40°C to +85°C, and the storage temperature range is -65°C to +150°C.
- What are some typical applications of the MDC3105DMT1G?
Typical applications include telecom, computer and office equipment, consumer electronics, industrial devices, and automotive systems.
- Is the MDC3105DMT1G Pb-free and halide-free?
Yes, the MDC3105DMT1G is Pb-free and halide-free.
- How does the MDC3105DMT1G handle transient thermal response?
The device has a detailed transient thermal response characteristic that allows designers to determine the maximum limit on transistor power dissipation for pulsed operation based on duty cycle and temperature range.
