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Texas Instruments UCC28704DBVR-1 | Demoboard PMP21618
Universal input reference design for 12-V lead acid battery charger
Overview
| Topology | Flyback Converter |
| Input voltage | 85-265 V |
| Switching frequency | 0.88-94 kHz |
| Output 1 | 14 V / 2.5 A |
| IC revision | A |
Description
This reference design takes a Universal AC input (85 VAC - 265 VAC) and converts to a 17.5-V isolated output using a PSR flyback topology. It is then followed by a battery charger circuit, which outputs up to 15 V to a lead acid battery. This is a fast-charge design capable of delivering 12 V @ 2.5 A (30 W) to the battery.
Features
- Universal input (85 VAC - 265 VAC), which can be used to power up the charger worldwide
- Conducted EMI testing provided
- Primary side regulated (PSR) flyback topology provides a cost-effective solution
- Small form factor to fit any mechanical housing of typical battery chargers
Typical applications
- USB Type-C AC Adapters for Consumer Electronics
- Low Power AC to DC SMPS
- Industrial and Medical SMPS
- Adapters and Chargers for Phones and Tablets
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | Pins | Application | PCB/Cable/Panel | Modularity | Type | Wire Section | C | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | Packaging | IR (A) | L (mH) | RDC max. (mΩ) | VR (V (AC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 691101710002 | SPEC | – | 6 files | WR-TBL Series 101 - 5.00 mm Horizontal Entry Modular | 2 | Wire Protector | PCB | Yes | Horizontal | 26 to 14 (AWG) 0.5 to 2.5 (mm²) | – | – | – | – | – | – | 5 | Box | 16 | – | – | – | – | – | 10 | – | 12.6 | THT | |
 | 744822120 | SPEC | 10 files | WE-CMB Common Mode Power Line Choke | 4 | – | – | – | – | – | – | – | – | – | – | -40 °C up to +125 °C | – | – | 0.5 | 20 | 540 | 250 | 1500 | MnZn | 17.5 | 13 | 22 | THT | ||
 | 890324025017 | SPEC | 8 files | WCAP-FTX2 Film Capacitors | – | Across the mains | – | – | – | – | 100 nF | X2 | 300 | 0.1 | 30 GΩ | -40 °C up to +105 °C | 15 | Bulk | – | – | – | 275 | – | – | 18 | 6 | 12 | Boxed THT | ||
 | 7447034 | SPEC | – | 6 files | WE-FI Leaded Toroidal Line Choke | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 2.6 | 0.043 | – | – | – | – | 13.5 | 7.5 | – | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 691101710002 | SPEC | – |
| 744822120 | SPEC | |
| 890324025017 | SPEC | |
| 7447034 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Product series | Pins | Application | PCB/Cable/Panel | Modularity | Type | Wire Section | C | Safety Class | dV/dt (V/µs) | DF @ 1 kHz (%) | RISO | Operating Temperature | Pitch (mm) | Packaging | IR (A) | L (mH) | RDC max. (mΩ) | VR (V (AC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | Samples |
|---|