Texas Instruments TPS2410EVM User manual

Using the TPS2410EVM

User's Guide

Literature Number: SLVU181B

October 2006–Revised September 2019

LOAD

GND

One TPS2410 and

N-Channel MOSFET

Replaces One Diode

TPS2410

A2 C2

A1 C1

PS1

PS2

+V1

GND

+V1

TPS2410

2SLVU181B–October 2006–Revised September 2019

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TPS2410 EVM (HPA204)

User's Guide

SLVU181B–October 2006–Revised September 2019

TPS2410 EVM (HPA204)

This user's guide is to facilitate operation of the TPS2410 and TPS2411 evaluation module. It is used by

an engineer or technician, and supplements the TPS2410, TPS2411 data sheets, schematics, and circuit

board labeling. Two variant of EVM exists for two different package options. TPS2410EVM and

TPS2411EVM are used in evaluation of the 14 Pin TSSOP (PW) packaged device and TPS2411EVM-096

can be used to evaluate 14 Pin UQFN (RMS) packaged device. Schematic of both EVM remains the

same, however PCB and BOM files differ due to different package option.

1 Introduction

The TPS2410 controls an N-channel MOSFET to operate in circuit as an ideal diode. The MOSFET

source and drain voltages are monitored by TPS2410 pins A and C. The TPS2410 drives the MOSFET

gate high if VAC exceeds 10 mV, and turns the MOSFET off if VAC falls below a threshold that is both

programmable and dependent on the choice of TPS2410 or TPS2411.

The TPS2410 has a turn-off point of 2.5-mv VAC.

TPS2411 is similar to TPS2410 when RSET is open and has a resistor programmable MOSFET turn-off

point. The TPS2411 can even be set to a slightly negative shutdown allowing for some voltage back

current.

Figure 1 shows the conventional wire-OR of power supplies with diodes. Each diode D1 and D2 is

replaced by a TPS2410 and MOSFET eliminating the voltage and power loss in the diode.

The evaluation module is set up to wire-OR two power supplies for redundant power to a load using two

TPS2410s and MOSFETs. This document contains setup and user information about this evaluation

module to assist with the operation of TPS2410.

Figure 1. Conventional Wire-OR Power Supplies

Channel 1

TPS2410

Glitch

Maker

STATUS

Output

FET

Output

FET

Load

PS 2

PS 1

+ 5 V PS

RSET

FILTER

Channel 2

TPS2410

Protect

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Introduction

SLVU181B–October 2006–Revised September 2019

TPS2410 EVM (HPA204)

Reference Figure 2, a block diagram of the TPS2410EVM and TPS2411EVM.

• The 5-V supply is used to power status LEDs. It is jumper selected to power VDD on the TPS2410s

and the glitch circuit if the control voltage is less than 3.0 V.

• The status outputs turn on LEDs to give a visual condition of the system Fault, power good and gate

status are displayed.

• The Glitch maker, discussed in the Test Methods Section applies a 1-Ωload to the input supply for

100 μs. This disruption allows the user to scope test points and observe system recovery.

• The RSET resistor is used to program the turn-off point of the TPS2411.

• The Filter compensates for system noise.

• The UV and OV circuits set permissible limits for input operating voltage.

Figure 2. EVM Block Diagram

MOSFET Configurations

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TPS2410 EVM (HPA204)

2 MOSFET Configurations

The TPS2410 EVM is supplied with IRL3713 MOSFETS. These MOSFETs can be replaced with user

selected parts if desired as there are alternative MOSFET footprints that accept N-channel parts in

D2PACK, DPACK, and SOIC packages. The schematic is shown in Section 4.

The MOSFETs are configured to operate as singles with only Q6 and Q13 populated as supplied. They

may be configured to operate in parallel on the PS1 channel by populating Q6 and Q5 and shorting drain

to source on Q4. Similarly, for parallel operation on the PS2 channel, populate Q13 and Q12 and short

drain to source on Q11. MOSFETs can be configured back-to-back by populating only Q4 and Q5 on

channel 1, and Q12 and Q11 on channel 2.

In single or parallel configurations, the body diode of the MOSFET limits VAC to 0.7 V. For back to back

MOSFETs, there could be a danger of exceeding the VAC operating maximum 5 V. The VAC protect circuit

is a low powered FET that is turned on when VAC approaches the maximum.

3 LED Indicators

Each channel has LED indicators for fault (FLTB), gate status (STAT), and power good (PG). Table 1

summarizes the indicators. Each indicator is labeled on the circuit board for easy reference.

Table 1. LED Indicators

Indicator Channel 1 Channel 2 LED On

Fault (FLTB) D3 D8 Fault = on

Gate Status (STAT) D2 D7 Bad gate = on

Power Good (PG) D1 D6 Power good = on

3.1 User Circuits

There are two sections of the circuit board with plated through holes for user defined circuits.

3.2 Materials Needed – TI Supplied

• TPS2410 evaluation module

• TPS2410 reference design documentation

• TPS2410 data sheet

3.3 User Supplied

• 2 – power supplies for wire-OR to load, up to 25 A

• 1 – 5-V power supply to supply EVM

• Power supply cables

• Load – active load, power resistors or actual load

• Oscilloscope

• Current probe

• Differential probe

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LED Indicators

SLVU181B–October 2006–Revised September 2019

TPS2410 EVM (HPA204)

3.4 Jumper Description

Jumpers J1, J2, J13, J14

VDD can be powered by the input power supply pin A, Jump J2-2, 3 and J14-2, 3. When it is powered by

the load, pin C, jump J2-1, 2 and J14-1, 2. If A and C are less than 3 V, connect the 5 V to VDD, jumper

J1-1 to J2 -2 and J13-1 to J14-2.

J3, J15

Jumpers J3 and J15 connect a pot to the RSET pin when testing the TPS2411. These jumpers are

normally left open when testing the TPS2410.

J4, J17

Jumpers J4 and J17 are open to enable the UV and OV inputs to the TPS2410.

Jumper J6 is on to connect the STAT pins together on both TPS2410 channels. When the STAT pin is

low, the turn off of the channel powering the load is de-sensitized.

Jumper J8 is the gate voltage for the Glitch FET. Jump J8-2, 3 when the PS1 voltage is greater than 5 V.

Jump J8-1, 2 to use the 5-V supply when PS1 is less than 5 V.

J16

Jumper J16-2, 3 connects pin C to the load for single or parallel FETs. Connect J16-1, 2 to protect the pin

A and C inputs when output FETs are configured back-to-back.

3.5 Procedure – Jumper Set-Up

An initial jumper setup is recommended in Table 2. The module has flexibility to operate in other modes.

Change jumpers to operate in other configurations as required after getting started. After the initial setup,

reference the schematic and set jumpers as required for testing. Other J reference designators on the

schematic are simple connectors.

Table 2. Initial Jumper Settings

Jumper Function Selection Comment

J1 5 V to VDD, CH1 Open

J2 A or C to VDD, CH1 Jumper 2 - 3 Connects A

J3 Install to use RSET, CH1 Open

J4 In to disable OV channel 1 Open

J6 In to OR STAT lines Open

J8 5 V or PS1 to gate of PS1 pulse Jumper 2 - 3 Connects PS1

J13 5 V to VDD, CH1 Open

J14 A or C to Vdd, CH2 Jumper 2 - 3 Connects A

J15 Install to use RSET, CH2 Open

J16 Connects the load to CH2 C or FET Jumper 2 - 3 Connects C

J17 In to disable OV Channel 2 Open

LED Indicators

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3.6 Power Supply Connection

Connect the power supplies and load to the TPS2410 test card as shown in Table 3. Loading less than 30

A is safe for IRl3713S. The load can be a test load or the actual system load.

Table 3. Power Supply Connection

Connection Supply Terminal

PS1 +V PS1, J12

PS1 PS1, J312 IN1, J5

PS1 GND PS1GND, J10

PS2 +V PS2, J18

PS2 GND PS2GND, J19

5 V 5 V J20-2

5GND GND J20-1

Load + Load, +V J7

Load – GND J11

3.7 OV and UV Setup

Set the OV and UV pots for each input voltage selected and re-adjust these pots when the input voltage

range is changed.

For this example, PS1 and PS2 are 12 V ±20 %. Set PS1 to the undervoltage set point, 9.6 V, and adjust

R13 until TP7 measures 0.6 V, reference Table 4. Set PS1 to the overvoltage set point, 14.4 V, and adjust

R12 until TP10 measures 0.6 V.

Complete this procedure for channel 2. Set the power supply voltages, PS1 and PS2, to the typical input,

12 V.

Table 4. UV and OV Setup

Supply Setting Potentiometer Test Point

PS1-UV R13 TP7

PS1-OV R12 TP10

PS2-UV R32 TP24

PS2-OV R31 TP26

3.8 Test Points

Table 5 lists some common test points for observation. There are more test points shown on the

schematic.

Table 5. Common Test Points

Function TP Channel 1 TP Channel 2

A TP2 TP18

C TP9 –

GATE TP11 TP22

OV INPUT TP10 TP26

UV INPUT TP7 TP24

FAULT TP8 TP25

PG TP4 TP20

RSET

OFF

470.02

V 0.00314

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=ç ÷

è ø

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LED Indicators

SLVU181B–October 2006–Revised September 2019

TPS2410 EVM (HPA204)

3.9 RSET

RSET is usually used in TPS2411 and sometimes in the TPS2410 to program the MOSFET turn-off point.

The RSET calculation from the data sheet is:

(1)

Calculate the RSET resistor. For the PS1 channel, remove jumper J3 and connect an ohm-meter from J3-

2 to GND. Adjust pot R8 for the calculated resistance value. Install the jumper J3-1, 2. Repeat for the PS2

channel RSET Pot R26 and jumper J15. The component reference designators for each channel is

summarized in Table 6.

Table 6. RESET Resistor Setting

RSET Pot Jumper Measure

R8 J3 J3-2

R26 J15 J15-2

3.10 Test Methods

The EVM has many operating configurations to view the system response. The user can make

modifications to the EVM jumpers and test other set ups.

3.11 Adjust Input Power Supplies

Vary the input voltages to observe system behavior. Jumpers can be set as in Table 2. Turn the power

supplies to the application typical volts; for this paper, we will use 12 V. The load is shared between the

supplies. Both gates will be on and the power supply current meters show output. Decrease one supply

voltage slightly and note the gate on that channel pass FET turn off and the other channel FET gate

increases to keep the FET on to supply the load. Observe the FET gates with a scope. With a voltmeter,

verify VDS for the on channel to be tens of millivolts.

3.12 Glitch Maker

Remove the jumper from J5 to J12 and connect the power supply to J12. This reduces the bulk

capacitance at the PCB power supply input. Set power supplies up for equal or slight differential voltage

so that the PS1 supply is contributing to the load. Press momentary switch S1, labeled PULSE. The switch

closure places a 1-Ωload across the input power supply for 100 μs. Observe the effect of an input power

supply glitch. Scope on the MOSFET gates, load voltage, TPS2410 fault output, STAT and PG.

3.13 Load Change

A dynamic change to the load can be made by switching additional load on or off with an external switch.

Some power load test equipment can be used to dynamically change the load.

GATE2 - 5 V/div

PSI - 100 mV/div

GATE1 - 10 V/div

LOAD - 500 mV/div

GATE1 - 10 V/div

PSI - 1 V/div

GATE2 - 10 V/div

LOAD - 1 V/div

Scope Traces

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TPS2410 EVM (HPA204)

4 Scope Traces

Figure 3. PSI Shorted, Loaded

Figure 4. PSI Glitched

GATE1 - 10 V/div

FAULT - 5 V/div

STAT - 5 V/div

PG - 5 V/div

PSI - 100 mV/div

GATE2 - 10 V/div

GATE1 - 10 V/div

LOAD - 200 mV/div

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Scope Traces

SLVU181B–October 2006–Revised September 2019

TPS2410 EVM (HPA204)

Figure 5. PSI Set to Standby

Figure 6. PSI Set to Standby

STAT - 5 V/div

FAULT - 5 V/div

PG - 5 V/div

GATE1 - 10 V/div

STAT - 5 V/div

FAULT - 5 V/div

PG - 5 V/div

Scope Traces

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TPS2410 EVM (HPA204)

Figure 7. PS2 On - PSI Turned On From Standby

Figure 8. PSI Turned On From Standby

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