TPM8860 (3PEAK) vs. DRV8860 (TI) Pin-to-Pin Replacement Analysis Report

Feature

TPM8860 (3PEAK)

DRV8860 (TI)

Analysis

Product Positioning

8-Channel Smart Low-Side Driver Array

8-Channel Serial Interface Low-Side Driver

Both are 8-channel low-side drivers with serial interfaces.

Core Function

Protected low-side driver with diagnostics

Protected low-side driver with over-current protection

TPM8860 offers more comprehensive diagnostics.

Target Applications

Relays, Solenoids, LEDs, PLC Digital Outputs

Relays, Unipolar Stepper Motors, General Low-side Switches

Applications are very similar.

Key Advantages

✅ Higher drive current (1.5A/ch)

✅ Wider voltage range (5-40V)

✅ Configurable PWM functionality

✅ Proven in industrial applications

TPM8860: Superior power handling.

DRV8860: Better for precise timing control.

Pin #

TPM8860 Pin

DRV8860 Pin

Match?

Notes

1

VM

VM

✅

Motor Power Supply Input

2

SDI

DIN

✅

Serial Data Input (Different name, same function)

3

SCLK

CLK

✅

Serial Clock Input

4

LATCH

LATCH

✅

Latch Signal

5

GND

GND

✅

Ground

6

SDO

DOUT

✅

Serial Data Output (Different name, same function)

7

nFAULT

nFAULT

✅

Open-Drain Fault Output

8

EN

ENABLE

✅

Enable Signal (Different name, same function)

9-16

OUT8-OUT1

OUT8-OUT1

✅

Output Channels (Same order)

Parameter

TPM8860

DRV8860

Comparison Result

Operating Voltage Range

5 - 40 V

8 - 38 V

✅ TPM8860 has a wider range

Max Output Voltage

48 V (Transient)

40 V

✅ TPM8860 handles higher voltage

Single Chan. Continuous Current

1.5 A

0.56 A (Single channel)

✅ TPM8860 is significantly stronger

Total Continuous Current (8 ch)

4 A

1.6 A (8 channels)

✅ TPM8860 is significantly stronger

On-Resistance (Rds(on))

0.5 Ω @500mA, 25°C

1.5 Ω @150mA, 25°C

✅ TPM8860 is more efficient

Serial Interface Speed

10 MHz

Not specified (Typ. 200kHz)

✅ TPM8860 is faster

Over-Current Protection (OCP)

1.65 - 2.8 A

0.62 A

✅ TPM8860 has a higher threshold

Temperature Range

-40°C to +125°C

-40°C to +85°C

✅ TPM8860 has a wider range

Functional Block

TPM8860

DRV8860

Conclusion

Power Management

4.5-40V Wide Input LDO

8-38V Input

✅ TPM8860 adapts to a wider range

Output Stage

500mΩ MOSFET Array

1.5Ω MOSFET

✅ TPM8860 has higher efficiency

Protection Circuits

OCP/SCP/OLP/OTP/UVLO

OCP/TSD/UVLO (OL on DRV8860 only)

✅ TPM8860 protection is more comprehensive

Diagnostics

Real-time per-channel fault report

Fault read via registers

✅ TPM8860 diagnostics are more direct

PWM Control

No dedicated PWM module

Configurable PWM duty cycle & timing

❌ DRV8860 has an advantage in PWM applications

Application Scenario

Recommended Chip

Replacement Suggestion

Risk Description

Industrial PLC Output

TPM8860

DRV8860 requires derating

⚠️ DRV8860 may have insufficient current margin

LED Driving (with Dimming)

DRV8860A

TPM8860 cannot replace for PWM dimming

❌ TPM8860 lacks dedicated PWM function

Solenoid Array

TPM8860

DRV8860 only suitable for low-current solenoids

⚠️ Verify solenoid inrush current

Stepper Motor Drive

DRV8860

TPM8860 lacks configurable PWM timing

⚠️ Dynamic performance may differ

Automotive Electronics

TPM8860

DRV8860 voltage range may be insufficient

⚠️ Verify for 12V system cold-crank

Replacement Direction

Feasibility

Conditions / Limitations

Risk Level

TPM8860 → DRV8860

Conditional

Load current < 0.5A, No PWM function required

⚠️ Medium Risk

DRV8860 → TPM8860

Fully Feasible

May require thermal redesign, compatible with higher speed

✅ Low Risk

DRV8860A → TPM8860

Fully Feasible

When open-load detection is not required

✅ Low Risk