SLUAAP4 October   2023 LM2005 , LM2101 , LM2103 , LM2104 , LM2105 , LM5108 , UCC27531 , UCC27710 , UCC44273

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Gate Driver IC Configurations
  6. 3Key Voltage and Current Specifications
    1. 3.1 Voltage Ratings
    2. 3.2 Peak Current
  7. 4Robustness Features
    1. 4.1 Undervoltage Lockout
    2. 4.2 Negative Voltage Handling
    3. 4.3 Cross-Conduction Protection
  8. 5Board Space, Thermal Performance, and Other Considerations
  9. 6Summary
  10. 7References

6 Summary

To choose an appropriate gate driver, it’s important to consider the balance of robustness, size/cost, and compatibility with other system components (like the microcontroller and power switches). For example:

  • Compact home appliances can value minimizing PCB size and choose small SON packages that integrate components and offer improved thermal performance.
  • High-volume consumer markets like e-bikes can emphasize finding general-purpose, cost-effective drivers with multisource pinouts.
  • Noisy motor systems can prioritize robustness and carefully choose based on voltage ranges or shoot-through protection methods.
  • Stepper drive systems can need to accommodate limited-GPIO microcontrollers and seek out drivers that support a single-PWM input.

Table 6-1 and Table 6-2 summarize some common design considerations for DC motor drive systems and gate drivers that can address them. For further detail on features and specifications, reference the device data sheet.

Table 6-1 Half-Bridge Driver Quick Reference Table
Design ConsiderationLM2101LM2103,LM2104LM2105LM5108UCC27710UCC27301A
Bootstrap supply voltage

Absolute maximum VHB (for margin against motor transients).

107 V107 V107 V110 V700 V120 V
Negative voltage handling(1)

Abs. minimum transient VHS (for margin against negative transients).

–19.5 V–19.5 V–19.5 V–7 V–11 V(1)–(24–VDD) V

Interlock or dead time

Shoot-through protection.

✗

✓

(fixed dead time)

✗

✓

(interlock)

✓

(interlock)

✓

(interlock)

Integrated bootstrap diode

Reduces components.

✗✗✓✓✗✓

Package

Approximate sizes.

5x4mm (SOIC)

2x2mm (WSON)

5x4mm (SOIC)

5x4mm (SOIC)

2x2mm (WSON)

3x3mm (VSON)5x4mm (SOIC)

5x4mm (SOIC)

3x3mm (VSON)

Source/sink current

Eliminates the need for external booster stages for higher current.

0.5 A/0.8 A0.5 A/0.8 A0.5 A/0.8 A1.6 A/2.6 A0.5 A/1.0 A3.7 A/4.5 A

UVLO

Helps protect the power switch from overheating.

8 V8 V5 V5 V10 V8 V

Single-input compatibility

Reduces PWM signals.

✗✓(1)✗✗✗✗
Recommended when… Minimal features are needed or cost alone is most critical.Support for a single PWM input is the top priority.Board space and cost are most critical.Driving multiple switches in parallel or driving at high frequency.High-voltage application requires VHB margin > 120 V.Driving coils (linear motors) or high-frequency DC motors.
Table 6-2 Low-Side Driver Quick Reference Table
Design ConsiderationUCC27517AUCC27531UCC27624
Number of channels112

Supply voltage (VDD)

Absolute maximum VDD (for margin against transients).

20 V35 V30 V

Negative voltage handling

Rec. minimum transient VIN (for margin against negative transients).

0 V–5 V–10 V

Package

Approximate sizes.

2.9x1.6mm (SOT-23)

5x4mm (SOIC)

2.9x1.6mm (SOT-23)

5x4mm (SOIC)

3x3mm (VSON)

Source/sink current

Eliminates the need for external booster stages for higher current.

4 A/4 A2.5 A/5 A5 A/5 A

UVLO

Helps protect the power switch from overheating.

5 V8 V5 V
Recommended when… Driving a single MOSFET and board space and cost are most critical.Driving a single IGBT (or MOSFET) and robustness is most critical.Driving multiple MOSFETs and robustness is most critical.
1. Values are verified by characterization only and are not production tested.
1. This is the recommended minimum specification (no absolute minimum specified for this device). Logic operational for HS of –11 V to +600 V at HB–HS = 20 V. See UCC27710 data sheet for more details.
1. LM2103 has an inverting LI pin (nLI). LM2104 has one input pin (INH) and an inverting shutdown pin (nSD).