Infineon TLD5099EP User Manual

Boost to battery evaluation kit

User Manual

TLD5099EP

About this document

Product description

The TLD5099EP is an AEC qualified DC/DC boost controller, especially designed to drive LEDs.

• Built in diagnosis and protection features

• Pulse width modulator to implement a dimming function with reduced color shiing

• Spread spectrum modulator to improve the EMI performance

Scope and purpose

Scope of this user manual is to provide to the audience instructions on usage of TLD5099EP boost to battery
evaluation board.

Intended audience

This document is intended for engineers who need to perform measurements and check performances with
TLD5099EP boost to battery evaluation board.

Table of contents

About this document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2 Quick start procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

3 Current adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

4 Power derating (battery dependent current) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

5 Embedded PWM engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6 Cold crank survival circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

7 Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

8 PCB layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

9 Bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

10 Eiciency measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

11 Maximizing eiciency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

12 Minimizing EM emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

13 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

User Manual

www.infineon.com 2021-01-18

Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Please read the Important Notice and Warnings at the end of this document

Boost to battery evaluation kit

TLD5099EP

1 Description

1 Description

Evaluation board for high power LED application with TLD5099EP product in boost to battery topology.
Default configuration of the board is boost to battery topology without any additional features enabled. In this

configuration, it can deliver up to 21 W to the load with an eiciency above 84%. Auxiliary circuits, which protect
the DC-DC and the load during short to ground are present.

The board is also equipped with the following features that are enabled by jumpers:

• Output current adjustment trimmer

• Power derating circuitry

• Embedded PWM engine

• Cold crank survival circuit (CCSC)

Figure 1 Board picture

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1 Description

Figure 2 Simplified schematic

Table 1 Performance summary

Parameter Conditions Value

Input supply voltage Jumper X9 in position 2-3 (CCSC deactivated)

Parameter degradation below 6.5 V

Input supply voltage Jumper X9 in position 1-2 (CCSC active) 8 V to 27 V

Output current Jumper X12 open 1 A

Switching frequency VIN = 13.2 V; spread spectrum "on" 400 kHz

Eiciency Measured with 7 white standard LED 3 V @ 1 A

output current

Output voltage range Output voltage related to positive input 6 V to 23 V

Output overvoltage
protection

Output voltage related to ground 59 V

8 V to 27 V
Down to 6.5 V for less than 2 s

Down to 3.0 V for less than 2 s

> 84%

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2 Quick start procedure

2 Quick start procedure

The default configuration of the board has all additional features disabled. In this configuration the output
current cannot be adjusted. The PWM signal has to be applied as digital signal on connector X18 (max. 45 V).

Jumpers are positioned as follows:

Table 2 Jumper position

Jumper number Condition Meaning

X9 Close 2-3 Disable CCSC

X5 Close 2-1 External dimming enabled

X10 Close 2-1 Disable battery dependent current

The default configuration is depicted below:

Figure 3 Default configuration of the board

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3 Current adjustment

3 Current adjustment

The output current adjustment can be performed by changing the value of trimmer R15 with a screwdriver,
when X10 is closed in position 1-2 and X12 is closed. The output current can vary from 0 to 100% of the
maximum output current (in this evaluation board from 0 to 1 A). By removing jumper X12, the output current
will reach its maximum value. The PWM signal has to be applied as digital signal on connector X18 (max. 45 V).

Jumpers are positioned as follows:

Table 3 Jumper position

Jumper number Condition Meaning

X9 Close 2-3 Disable CCSC

X5 Close 2-1 External dimming enabled

X10 Close 2-1 Disable battery dependent current

X12 Closed Adjustable output current enabled

Figure 4 Current adjustment

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4 Power derating (battery dependent current)

4 Power derating (battery dependent current)

The power derating acts by reducing V

(and thus the output current) when the battery voltage drops below

SET

8 V. It works better when R15 is trimmed to its maximum value. Otherwise a dierent derating profile is applied.
If a dierent derating profile is needed, R14 has to be changed. The aim is to have 1.6 V on pin SET when the
battery voltage reaches the desired threshold, below which the output current must decrease proportionally.

R14 can be calculated using:

R14 = R15 + R18 ⋅

BATT

1.6

− 1

(1)

V

where

• R15 = 10 kΩ

• R18 = 560 Ω
For example, if the power derating should start when the battery voltage drops under 12 V, R14 must be

replaced with a 68 kΩ 0603 resistor (please refer to the TLD5099EP datasheets for more information).
Jumpers are positioned as follows:

Table 4 Jumper position

Jumper number Condition Meaning

X9 Close 2-3 Disable CCSC

X5 Close 2-1 External dimming enabled

X10 Close 2-3 Enable battery dependent current

X12 Closed Adjustable output current enabled

Figure 5 Power derating

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