Texas Instruments TPS4810-Q1 User manual

EVM User's Guide: TPS4810Q1EVM TPS4810-Q1
TPS4810-Q1 Evaluation Module for Smart High-Side
Driver
Description
The TPS4810Q1EVM allows reference circuit
evaluation of TI's TPS4810-Q1 smart high-side driver.
The TPS4810-Q1 is a 3-V to 80-V smart high-side
controller and has two strong 2-A gate drivers with
separate control inputs (INP1, INP2) to drive back
to back MOSFETs in common source configuration.
The TPS4810-Q1 provides adjustable short circuit
protection with configurable auto-retry and latch-off
fault behavior.
Features
• 3-V to 80-V operating voltage range
• 20-A to 50-A adjustable short circuit protection
using onboard jumpers
• Selectable high-side or low-side current sense
configuration
• Programmable short-circuit protection delay
• Programmable auto-retry and latch options
• LED status indication for fault conditions
Applications
•48-V battery management system
•DC/DC converter
•Automotive power distribution box
•Cordless power tools
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1 Evaluation Module Overview
1.1 Introduction
TPS1210-Q1 device can also be evaluated on this EVM by replacing the TPS48100QDGXRQ1 (U1) with
TPS12100QDGXRQ1 and connecting EN/UVLO (TP3) to VAUX (TP13).
This user’s guide describes the TPS4810-Q1 evaluation module (EVM). This guide provides configuration
information, test setup details and contains the EVM schematics, bill of materials, assembly drawings, and top
and bottom board layouts.
CAUTION
Hot surface. Contact can cause burns. Do not touch.
1.2 Kit Contents
Table 1-1. TPS4810Q1EVM Kit Contents
Item Description Quantity
TPS4810Q1EVM PCB 1
1.3 Specification
• 24-V to 54-V (typ) operation
– While testing for input voltage greater than 54-V, remove input 54-V TVS or use an appropriate TVS
• Current sensing options:
– Low-side and high-side using external sense resistor (Selectable using CS_SEL pin)
– MOSFET VDS
1.4 Device Information
The TPS4810x-Q1 family is a 100-V low IQ smart high side driver with protection and diagnostics. With wide
operating voltage range of 3 V–80 V, the device is an excellent choice for 12-V, 24-V and 48-V system designs.
The device can withstand and protect the loads from negative supply voltages down to –65 V. The device has
two strong 2-A (src/sink) gate drivers with separate control inputs (INP1, INP2) to drive back to back MOSFETs
in common source configuration. Strong GATE driving enables power switching using parallel MOSFETs in high
current system designs.
The device provides adjustable short circuit protection. Auto-retry and latch-off fault behavior can be configured.
By using CS+ and CS- pins, current sensing can be done either by an external sense resistor or by MOSFET
VDS sensing. High side or low side current sense resistor configuration is possible by using CS_SEL pin input.
The device also features diagnosis of the internal short circuit comparator using external control on SCP_TEST
input.
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2 Hardware
2.1 Overview
The TPS4810Q1EVM evaluation board enables evaluation of TPS48100-Q1 driver. The input power is applied
between connectors T1 and T4 while T2 and T3 provide an output connection to the load. Refer to the schematic
in Figure 4-1 and EVM test setup in Figure 3-1.
D3 provides the fault indication output for under-voltage fault, charge pump UVLO, short-circuit fault and during
SCP comparator diagnosis.
Table 2-1. TPS4810Q1EVM Evaluation Board Options and Setting
Part Number EVM Function Vin Range Vin UVLO ENABLE
(EN/UVLO)
Short Circuit Protection Features
Low Setting Hi Setting
TPS4810Q1EVM
Smart high
side driver with
reverse polarity
protection, short-
circuit protection
and diagnostics
24V–54V 24 V Active high 20 A 50 A
Low-side and high-
side using external
sense resistor
MOSFET VDS
sensing
Short-circuit
protection with auto-
retry/ latch response
2.2 General Configurations
2.2.1 Physical Access
Table 2-2 lists the TPS48111Q1EVM Evaluation Board input and output connector functionality. Table 2-3 and
Table 2-4 describe the test point availability and the jumper functionality.
Table 2-2. Input and Output Connector Functionality
Connector Label Description
T1 VIN Power input connector to the positive rail of the input power supply
T4 PGND Ground connection for the power supply
T2 VOUT Power output connector to the positive side of the load
T3 PGND Ground connection for the load
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Table 2-3. Test Points Description
Test Points Label Description
TP1 VIN Input power supply to the EVM
TP2 VOUT Output from the EVM
TP3 EN/UVLO Enable control (Active high) and undervoltage input
TP4 GATE GATE of the external Main MOSFET
TP5 G2 GATE of the charging MOSFET
TP6 TP6 Voltage sense node for FET diagnosis
TP7 INP1 Control input of external discharge FET
TP8 INP2 Control input of external charge FET
TP9 SCP_TEST Internal short circuit comparator (SCP) diagnosis input.
TP10 INP1/ Inversion of control input for external discharge FET
TP11 INP2/ Inversion of control input external charge FET
TP12 TMR Fault timer voltage
TP13 VAUX Auxiliary supply to bias the LEDs
TP14 RS+ Positive terminal of current sense input
TP15 RS- Negative terminal of current sense input
TP16, TP17 PGND Power Ground
TP18 GND Ground
TP19 FLT Fault output
Table 2-4. Jumper and LED Descriptions
Jumper Label Description
J1 SCP_TEST Internal short circuit comparator (SCP) diagnosis input.
1-2 Position disables the diagnosis function.
J2 TMR
Short-circuit protection delay setting.
1-2 Position sets 1 ms delay.
3-4 Position sets 10 ms delay.
5-6 Position sets the controller in Latch-off mode.
J3 ISCP
Short circuit protection threshold setting.
1-2 Position sets 20 A.
3-4 Position sets 30 A.
5-6 Position sets 50 A.
J4 CS_SEL
Current sense input selection.
1-2 Position selects high-side current sensing.
2-3 Position selects low-side current sensing.
D3
(RED – LED) D3 Fault indicator. LED turns ON for under-voltage fault, short-circuit fault, charge pump UVLO and during SCP comparator diagnosis.
2.2.2 Test Equipment and Setup
2.2.2.1 Power Supplies
One adjustable power supply with 0-V to 60V- output and 0-A to 50-A output current limit.
2.2.2.2 Meters
One DMM minimum needed.
2.2.2.3 Oscilloscope
A DPO2024 or equivalent, three 10 times voltage probes, and a DC current probe.
2.2.2.4 Loads
One resistive load or equivalent that can tolerate up to 50-A DC load at 60 V and capable of the output short.
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3 Implementation Results
3.1 Test Setup and Procedures
Make sure the evaluation board has default jumper settings as shown in Table 3-1.
Table 3-1. Default Jumper Setting for TPS4810Q1EVM Evaluation Board
J1 J2 J3 J4
1-2 5-6 1-2 1-2
Positive
Negative
Positive
Load
Negative
Voltmeter
PRINT
HELP
ALPHA
SHIFT
ENTER
RUN
D
GE RF I
A
JB KC L
7
M8 N9 O
D
GD GD G
D
G T 3 U
0
V. WXYZ
TAB
% UTILIZATION
HUB/MAU NIC
2
BNC
4Mb/s
Oscilloscope
Power
Supply
Figure 3-1. TPS4810Q1EVM Setup with Test Equipment
Follow the below instructions before starting any test and repeat again before moving to next test.
• Set the power supply output (VIN) to zero volts.
• Turn ON the power supply and set the power supply output (VIN) to 48 V, current limit = 50 A.
• Turn OFF the power supply.
• Set the jumper setting on EVM to default position as shown in Table 3-1.
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3.1.1 Power-up with EN Control
Use the following instructions to verify the power up profile of TPS48100-Q1.
1. Connect the EN/UVLO pin (TP3) to ground.
2. Enable the EN/UVLO to HIGH to verify the startup profile of BST, GATE and SRC.
Figure 3-2. Start-Up Profile of Bootstrap Voltage with INP1=INP2 = GND, CBST = 470 nF
Figure 3-3. Start-Up Profile with INP1=INP2 = HIGH, CBST = 470 nF
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3.1.2 Overload and Short Circuit Protection Test
Use the following instructions to perform over current test on the TPS4810Q1EVM:
1. Turn ON the power supply and set the power supply output VIN = 48 V, current limit = 50 A.
2. Set the Short Circuit Protection (SCP) threshold at 30 A by installing jumper J3 in 3-4 position and install
jumper J2 in 1-2 position to set 1-ms delay.
3. Enable the control inputs (INP1 and INP2).
4. Now, load the output to 25 A with electronic load and apply a step of 10 A to observe the overload behavior
of TPS48100-Q1.
5. Disconnect the load.
6. To perform short-circuit test, uninstall J2 to set shortest SCP delay.
7. Perform output short to capture the short-circuit behavior of TPS48100-Q1.
Figure 3-4. Overcurrent Response of TPS4810Q1EVM for 25-A to 35-A Load Step
Figure 3-5. Auto-Retry Response of TPS48100-Q1 for an Overcurrent Fault
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Figure 3-6. Latch-off Response of TPS48100-Q1 for an Overcurrent Fault
Figure 3-7. Output Short-Circuit Response of TPS48100-Q1
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3.1.3 Short-Circuit Protection Diagnosis Test
Use the following instructions to perform the short circuit protection diagnosis test
1. Set the input supply voltage VIN to 48 V and current limit of 10 A.
2. Enable the power supply.
3. Now, toggle the SCP_TEST (TP9) and observe the response of G1PU/PD and FLTb pins during short circuit
comparator (SCP) diagnosis.
Figure 3-8 shows the SCP_TEST response of TPS48100-Q1 device.
Figure 3-8. SCP_TEST Response of TPS48100-Q1
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3.1.4 Input Reverse Polarity Test
Use the following instructions to test the input reverse polarity protection:
1. Set the jumper setting on EVM to default position as shown in Table 3-1.
2. Set the input supply voltage VIN to 60 V and current limit of 10 A.
3. Connect the power supply positive to T4 and power supply negative to T1. The power supply is now
connected in reverse polarity at the input of TPS48100-Q1.
4. Enable the power supply.
5. Observe the waveform at VOUT (TP2) with an oscilloscope.
Figure 3-9 shows input reverse polarity protection of TPS48100-Q1 on TPS4810Q1EVM Evaluation Board.
Figure 3-9. Input Reverse Polarity Protection of TPS48100-Q1 Device
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