UP9616PDYA datasheet(6/18 Pages) UPI

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Conceptual

uP9616

uP9616-DS-C3202, Feb. 2017

www.upi-semi.com

D-

Functional Description

High Voltage Dedicated Charging Port (HVDCP) Mode

After power-up pins D+ and D- of uP9616 are shorted with

impedance R

DCP_DAT and internal reference voltage VREF is

set to V

BUS voltage 5.2V. The device is in a BC1.2 compatible

mode. If a portable device compatible with the Qualcomm

Quick Charge specification is connected, a negotiation

between HVDCP and PD is executed. Once the negotiation

is successful the uP9616 opens D+ and D- short connection

and D- is pulled down with a R

DM_DWN. The uP9616 enters

HVDCP mode. It monitors D+ and D- inputs. Based on the

specified control patterns, the internal voltage reference

value V

REF is adjusted in order to increase or decrease output

voltage to the required value.

The uP9616 is available in Class A version. Class A allows

to change the output voltage up to VBUS = 12V. If the

unplug event is detected the decoder circuitry turns-on an

internal current sink, which discharges the output capacitors

to a safe voltage level. If the uP9616 is set to a Continuous

mode it responds to the PD requests in a Single request

mode. It does not support Group request mode.

HVDCP Continuous Mode

The continuous mode of operation leverages the previously

unused state in QC2.0. If the portable devices try and utilize

this mode, it applies voltages on D+ and D- per Table 2.

Assuming the HVDCP supports this mode of operation, it

will glitch filter the request as it currently does, using

TGLITCH_V_CHANGE(40ms). Before the portable device

can begin to increment or decrement the voltage, it must

wait TV_NEW_REQUEST_CONT before pulling D+ and D-

high or low. Once this time has finished, the portable device

now attempts to increment or decrement the voltage. To

increment, the portable device sends a pulse of width

TACTIVE by pulling D+ to VDP_UP and then must return

D+ to VDP_SRC for TINACTIVE.

Table2. HVDCP detection voltage coding and status

Note: GND is not forced by the portable device. The portable

device shall go High-Z and the HVDCP pulls D- low through

Rdm_dwn. This is to prevent misdetection when current

flowing through GND causes the GND in the portable device

to be at a higher voltage relative to HVDCP GND. Care

should be taken in the portable device as this can result in

a negative relative voltage on D- as seen by the portable

device.

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