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Efficiency measurements

Figure 9

Efficiency vs. input voltage

This efficiency performance has been obtained with:

Table 3

Parameters influencing efficiency

Output load:

136 Ω power resistor

EMI filter:

Totally bypassed by closing the jumpers X1, X14, and X16

Efficiency performances can be increased, see

Voltage-mode boost to ground evaluation kit

TLD5098EP

7 Efficiency measurements

User Manual

2020-09-17

Summary of Contents for TLD5098EP

Page 1: ...to ground evaluation board Intended audience This document is intended for engineers who need to perform measurements and check performances with TLD5098EP voltage mode boost to ground evaluation boar...

Page 2: ...oltage mode boost to ground topology without any additional features enabled In this configuration it can deliver up to 17 W to the load with an efficiency above 91 Note The board is not protected aga...

Page 3: ...ss than 2 s Maximum output current Resistive load 350 mA Switching frequency VIN 13 2 V 400 kHz Efficiency Measured with a 136 power resistor as load 91 Output voltage range Output voltage related to...

Page 4: ...R25 R26 R25 VREF where VOUT is the desired output voltage and VREF 300 mV is the feedback reference voltage Correct device functioning is achieved if voltages VFBH and VFBL on both terminals of R25 a...

Page 5: ...ce starts without any external enable signal because pin EN Enable is connected directly to the positive rail See Chapter 4 for details Figure 4 Auto enable configuration Voltage mode boost to ground...

Page 6: ...Ext_EN 1 2 X14 Solder Jumper 2 Pins 1 2 X16 Solder Jumper 2 Pins 50V C14 470pF 50V C13 470pF 1 4 2 3 ACM70V 701 2PL TL00 L4 700R Chassis 1 2 Phoenix Contact X2 1935776 MIN Input Voltage V bat 8V TYP...

Page 7: ...8 10R 2010 R5 2 2R GND 1 2 D2 PMEG6030EP 115 GND GND GND 48V 350mA X8 5001 IVCC Vbat_FIL 100V C35 4 7uF 100V C34 4 7uF GND GND GND 100V C23 4 7uF 100V C22 4 7uF 100V C21 4 7uF GND 100V C20 4 7uF OVFB...

Page 8: ...5 PCB layout Figure 7 PCB layout top view Figure 8 PCB layout bottom view Voltage mode boost to ground evaluation kit TLD5098EP 5 PCB layout User Manual 8 2020 09 17...

Page 9: ...K ACM70V 701 2PL TL00 L6 47 uH TDK SPM10054T 470M HZ Q1 IPD90P04P4L 04 Infineon Technologies IPD90P04P4L 04 Q2 IPD25N06S4L 30 Infineon Technologies IPD25N06S4L 30 R1 10 k Vishay CRCW060310K0FK R5 2 2...

Page 10: ...d with Table 3 Parameters influencing efficiency Output load 136 power resistor EMI filter Totally bypassed by closing the jumpers X1 X14 and X16 Efficiency performances can be increased see Chapter 8...

Page 11: ...ting of R5 and C25 or choose a lower value for the capacitor C25 for example 470 pF 2 Bypass the whole EMI filter by bridging the jumpers X1 X14 and X16 3 Bypass the output ferrite beads L3 and L5 4 R...

Page 12: ...5 for example 2 2 nF 2 Include the whole EMI filter by removing bridges from the jumpers X1 X14 and X16 3 Replace the 10 resistor R8 with a higher value such as 22 or 33 4 Replace the main inductor L6...

Page 13: ...Document version Date of release Description of changes Rev 1 00 2020 09 17 First release related to evalboard S00_P00 Voltage mode boost to ground evaluation kit TLD5098EP 10 Revision history User M...

Page 14: ...liabilities of any kind including without limitation warranties of non infringement of intellectual property rights of any third party with respect to any and all information given in this application...