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General description

The TEA19051BTK is a highly configurable secondary side SMPS controller that is

available in many factory configured versions. Section 15 gives an overview of the offthe-

shelf available versions of the TEA19051BTK. To inquire about the possibilities of

customer-specific versions, contact your local sales representative.

The TEA19051BTK supports the following protocols:

? USB Type-C v.1.3

? USB power delivery (USB-PD) including programmable power supply (PPS)

? Battery Charging 1.2 (BC1.2)

? Qualcomm? QuickCharge? QC2.0, QC3.0, and QC4+

A complete smart-charging switch mode power supply (SMPS) can be built in

combination with the TEA193x primary controller and the TEA199x secondary side

synchronous rectifier (SR) controller.

The TEA19051BTK can be provided in several small packages with low pin count. Due

to its small number of external components, a small form factor SMPS can be built that

meets efficiency requirements like CoC Tier-2, EuP Iot6, and DOE v6 with an extremely

no-load power (< 30 mW).

The TEA19051BTK has a high level of digital integration. It incorporates all required

circuits, including a charge pump to drive an external NMOS load switch directly, a USBPD

physical interface (PHY), and an integrated driver for fast output discharge.

The output voltage and output current are continuously measured and are used to control

the SMPS. Two GPIO pins measure the adapter temperature and the temperature in the

cable/connector. Optionally, the GPIO pins can be used for other features, like supply

(see Table 4). The die temperature of the TEA19051BTK is monitored via an internal

temperature sensor.

Multiple protections ensure the best-in-class charging safety for the TEA19051BTK.

To ensure correct operation under all conditions, all protections except UVP are

implemented in hardware. The response of these protections can be programmed

as latched or safe restart. Although not recommended, these protections can also be

disabled individually via the settings in the non-volatile multi-time programmable (MTP)

memory.

If an output short circuit occurs, the power dissipation in the adapter can be below

50 mW.

For output voltage regulation, current regulation, and protection, only a single

optocoupler is required in the application.

The TEA19051BTK operates in CV mode with a better than 2 % voltage accuracy. In CC

mode, it operates with a better than 2 % full-load current accuracy.

Features and benefits

General

? Best-in-class fail-safe application for high-power adapters; gives complete protection

against overload conditions in the load (e.g. phone)

? Wide output voltage operating range (2.9 V to 21 V)

? Ultra-high efficiency together with TEA193x QR/DCM controller and TEA199x SR

controller

? Very low no-load power (< 30 mW for the complete system solution)

? High power density

? Dedicated SW pin to drive external NMOS directly

? Constant voltage (CV) and constant current (CC) control (programmable level)

? Precise voltage and current control with low minimum step size (voltage 12-bit DAC,

current 10-bit DAC)

? Continuous measurement of output voltage and output current with a better than 2 %

accuracy

? Low-cost HVSON16 package (suitable for reflow soldering)

? Low-cost bill of materials (BOM; ≈15 external components)

? Embedded MCU (with ROM, RAM, and MTP memory)

? Discharge pin for fast output voltage ramp down

? Built-in series regulator and programmable cable compensation

? Non-volatile MTP memory for storage of system configuration parameters

Protocol support

? USB Type-C v.1.3

? USB power delivery (USB-PD) 2.0 and 3.0 including programmable power supply

(PPS)

? Qualcomm? QuickCharge? QC2.0, QC3.0, and QC4+ protocols

? Battery Charging 1.2 (BC 1.2)

? Unstructured vendor defined messages (VDMs), which can be used for MTP

programming, e.g. to get Vendor IDs

Protections

? Overtemperature protection (OTP): one internal and two external

? Adaptive overvoltage protection (OVP)

? Adaptive undervoltage protection (UVP)

? Overcurrent protection (OCP)

? Undervoltage lockout (UVLO) protection

? Output short protection (OSP)

? Open-supply protection (OSUP)

? Open-ground protection (OGP)

? Overvoltage protection DP, DM, CC1, and CC2 pins

? Soft short protection at the CC1 and CC2 pins

? Soft short protection at the output

To ensure safe operation, the TEA19051BTK switches off the load during fault

conditions.