Overview
The MC34151DG, produced by onsemi, is a high-speed dual MOSFET driver designed to interface low current digital circuitry with power MOSFETs. This device is constructed using Schottky clamped Bipolar Analog technology, offering high performance and ruggedness in hostile industrial environments. It features two independent channels with high current totem pole outputs, making it ideal for driving large capacitive loads with high slew rates.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Power Supply Voltage | VCC | - | - | 20 | V |
| Logic Input Voltage | Vin | -0.3 | - | VCC | V |
| Drive Output Current | IO | - | - | 1.5 | A |
| Input Threshold Voltage | VIH/VIL | 0.8/1.75 | 1.58/2.6 | - | V |
| Input Current (High/Low State) | IIH/IIL | -200/-20 | - | 500/100 | μA |
| Output Voltage (Low State) | VOL | - | - | 0.8 | V |
| Output Voltage (High State) | VOH | - | - | 11.2 | V |
| Propagation Delay (10% Input to 10% Output) | tPLH/tPHL | - | 35/36 | 100/100 | ns |
| Drive Output Rise/Fall Time (10% to 90% / 90% to 10%) | tr/tf | - | 14/16 | 31/32 | ns |
| Operating Ambient Temperature | TA | -40 | - | 85 | °C |
Key Features
- Two independent channels with 1.5 A totem pole output
- CMOS and LSTTL logic compatible inputs with hysteresis
- Undervoltage lockout with hysteresis to prevent erratic system operation at low supply voltages
- Low standby current and efficient high-frequency operation
- Enhanced system performance with common switching regulator control ICs
- Pb-free and halide-free devices
- Internal diode to VCC for clamping positive voltage transients and NPN pullup transistor for negative output transients
- Immune to output latchup conditions
Applications
- Switching power supplies
- DC to DC converters
- Capacitor charge pump voltage doublers/inverters
- Motor controllers
- High-frequency printed circuit applications requiring low current digital circuitry to drive large capacitive loads
Q & A
- What is the primary function of the MC34151DG?
The MC34151DG is a high-speed dual MOSFET driver designed to interface low current digital circuitry with power MOSFETs.
- What are the key features of the MC34151DG?
Key features include CMOS and LSTTL logic compatible inputs, undervoltage lockout, low standby current, and high current totem pole outputs.
- What is the maximum power supply voltage for the MC34151DG?
The maximum power supply voltage is 20 V.
- What is the typical propagation delay for the MC34151DG?
The typical propagation delay is 35 ns for rising and 36 ns for falling edges.
- What are the typical output rise and fall times for the MC34151DG?
The typical output rise time is 14 ns and fall time is 16 ns with a 1.0 nF load.
- Is the MC34151DG immune to output latchup conditions?
- What are the typical operating ambient temperatures for the MC34151DG?
The operating ambient temperature range is from -40°C to +85°C.
- What types of packages are available for the MC34151DG?
The device is available in dual-in-line (PDIP-8) and surface mount (SOIC-8) packages.
- What is the purpose of the undervoltage lockout feature in the MC34151DG?
The undervoltage lockout feature prevents erratic system operation at low supply voltages by forcing the drive outputs into a low state until the supply voltage reaches a stable level.
- How does the MC34151DG handle high-frequency parasitic oscillations?
The device can use external Schottky diode clamps to reduce power dissipation and prevent output pins from being driven above VCC or below ground, thereby reducing high-frequency parasitic oscillations.
