TIDT417 November   2024

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Dimensions
    5. 1.5 Test Setup
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
  7. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Start-up Sequence

2.2 Efficiency Data

System efficiency is shown in Table 2-1 from VBUS to VSYS with charge disabled. There was no battery connected to the VBAT terminal. VSYS is equal to 3.75V.

Table 2-1 System Efficiency Data: VIN = 5V

VIN (V)

IIN (A)

VOUT (V)

IOUT (A)

PIN (W)

POUT (W)

Ploss (W)

Eff (%)

5.042

0.022

3.747

0.026

0.111

0.097

0.014

87.828

5.037

0.040

3.747

0.049

0.201

0.184

0.018

91.127

5.036

0.081

3.747

0.102

0.408

0.382

0.026

93.694

5.016

0.162

3.747

0.204

0.813

0.764

0.048

94.068

5.004

0.325

3.744

0.408

1.626

1.528

0.099

93.928

5.027

0.550

3.741

0.702

2.765

2.626

0.139

94.985

5.000

0.786

3.738

1.001

3.930

3.742

0.188

95.210

5.006

1.022

3.735

1.302

5.116

4.863

0.253

95.052

5.037

1.255

3.732

1.604

6.321

5.986

0.335

94.696

5.029

1.580

3.728

2.007

7.946

7.482

0.464

94.164

5.013

1.826

3.724

2.302

9.154

8.573

0.581

93.652

5.004

2.081

3.720

2.606

10.413

9.694

0.719

93.095

5.031

2.402

3.716

3.005

12.084

11.167

0.918

92.404
Table 2-2 System Efficiency Data: VIN = 9V

VIN (V)

IIN (A)

Vsys (V)

Isys (A)

PIN (W)

POUT (W)

Ploss (W)

Eff (%)

9.000

0.013

3.747

0.026

0.117

0.097

0.020

83.267

9.018

0.027

3.748

0.055

0.243

0.206

0.037

84.662

9.012

0.049

3.748

0.102

0.442

0.382

0.059

86.573

9.003

0.094

3.746

0.202

0.846

0.757

0.090

89.414

9.002

0.190

3.744

0.402

1.710

1.505

0.205

87.997

9.049

0.318

3.743

0.703

2.878

2.631

0.246

91.442

9.010

0.452

3.737

1.002

4.073

3.744

0.328

91.945

9.016

0.585

3.734

1.308

5.274

4.884

0.390

92.600

9.000

0.721

3.729

1.615

6.489

6.022

0.467

92.808

9.018

0.894

3.724

2.007

8.062

7.474

0.588

92.706

9.041

1.026

3.718

2.308

9.276

8.581

0.695

92.508

9.019

1.165

3.712

2.610

10.507

9.688

0.819

92.207

9.011

1.357

3.705

3.011

12.228

11.156

1.072

91.232

Charge efficiency is shown in Table 2-3, from VBUS to VBAT with charge enabled. A 1mF capacitor with an e-load set to constant voltage mode at 3.8V was used to simulate a battery for these measurements.

Table 2-3 Charge Efficiency Data: VIN = 5V

VIN (V)

IIN (A)

Vbat (V)

Ichg (A)

PIN (W)

Pcharge (W)

Ploss (W)

Efficiency (%)

5.007

0.133

3.823

0.162

0.666

0.619

0.047

93.002

5.025

0.274

3.857

0.330

1.377

1.273

0.104

92.444

5.042

0.636

3.947

0.773

3.207

3.051

0.156

95.145

5.020

0.863

4.002

1.028

4.332

4.114

0.218

94.963

5.035

1.091

4.054

1.285

5.493

5.209

0.284

94.834

5.017

1.336

4.108

1.543

6.703

6.339

0.364

94.568

5.055

1.493

4.146

1.717

7.547

7.119

0.428

94.323

5.011

1.681

4.185

1.893

8.423

7.922

0.501

94.049

5.068

1.928

4.243

2.157

9.771

9.152

0.619

93.665

5.014

2.138

4.283

2.336

10.720

10.005

0.715

93.332

5.006

2.314

4.322

2.512

11.584

10.857

0.727

93.724

5.007

2.500

4.358

2.685

12.518

11.701

0.816

93.479

5.006

2.700

4.401

2.861

13.516

12.591

0.925

93.157

5.021

2.885

4.43

3.035

14.486

13.445

1.041

92.817
Table 2-4 Charge Efficiency Data: VIN = 9V

VIN (V)

IIN (A)

Vbat (V)

Ichg (A)

PIN (W)

Pcharge (W)

Ploss (W)

Efficiency (%)

9.052

0.078

3.826

0.161

0.706

0.616

0.090

87.243

9.011

0.164

3.856

0.328

1.478

1.265

0.213

85.584

9.002

0.371

3.941

0.772

3.340

3.042

0.297

91.098

9.003

0.498

3.995

1.033

4.483

4.127

0.357

92.045

9.024

0.627

4.044

1.294

5.658

5.233

0.425

92.487

9.024

0.762

4.097

1.555

6.876

6.371

0.505

92.649

9.005

0.903

4.151

1.815

8.132

7.534

0.597

92.653

9.025

0.997

4.187

1.989

8.998

8.328

0.670

92.554

9.001

1.147

4.241

2.249

10.324

9.538

0.786

92.385

9.059

1.291

4.294

2.509

11.695

10.774

0.922

92.120

9.029

1.399

4.330

2.681

12.632

11.609

1.023

91.903

9.008

1.508

4.367

2.854

13.584

12.463

1.121

91.750

9.031

1.552

4.371

2.941

14.016

12.855

1.161

91.717

9.008

1.611

4.392

3.027

14.512

13.295

1.217

91.612