XG628 fast charging voltage adjustment IC

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Xg628 fast charging voltage adjustment IC

1. summary

Xg628 single chip integrates USB, PD and other fast charging protocols, and supports PD3 0/2.0，BC1. Second class boost fast charging protocol, automatic detection

Vconn and analog E-MARK chip, up to 100W power, built-in PD communication module, high integration and simplified periphery. Integrated output voltage detection function, and provides over-temperature, over-voltage protection and other functions. It can be widely used in various electronic devices to expand high-power input, such as wireless charger, electric toothbrush, rechargeable razor, lithium battery power tools and other applications.

2. Functional features

 Support 4V to 22V input voltage

 Support PD3 0/2.0，BC1. Second class fast charging protocol

 Support USB type-C PD, forward and reverse plug detection and automatic switching

 Support E-MARK simulation, automatically detect vconn, and support PD request of 100W power

 The request voltage can be dynamically adjusted in a variety of ways

 High single-chip integration, simplified periphery and low cost

 Built in overvoltage protection module ova and overtemperature protection module OTA

3. Application occasion

 Wireless charger

 Laptop charging cable

 Lithium battery small household appliances

 Lithium battery power tools

 portable source

4. Pin Out

Xg628 package pin arrangement

Number	Pin Name	Type	Description
XG628	Pin Name	Type	Description
0	GND	power	Common ground terminal, heat dissipation base plate
1	VDD	power	Working power input, external 1uF decoupling capacitor, series resistance to VBUS
4,5	DP,DM	Two way	USB bus
6,7	CC1,CC2	Two way	Type-C CC bus
2,3,9	CFG1,CFG2, CFG3	Analog input	Voltage configuration input
8	VBUS	Analog input	Voltage detection input requires series resistance to the external input VBUS
10	PG	Open drain output	Default Hi-Z, customizable function

5. Function description

Xg628 is a PD3 0/2.0，BC1. The power receiving terminal IC of protocol power supply input by class 2 boost and fast charging protocol supports the request of voltage in the range of 4 ~ 22V, and can dynamically configure the voltage gear of priority request in a variety of ways.

Xg628 provides single resistance configuration mode and level configuration mode.

6. level configuration

It is suitable for MCU dynamic adjustment request voltage or PCB fixed request voltage.

Cfg1, CFG2 and cfg3 are directly connected to the IO port of the external MCU, or directly connected to the VDD / GND pin of xg628 chip, and the level is used to configure the request voltage. The truth table is as follows.

CFG1	CFG2	CFG3	Adjust voltage output
1	-	-	5V
0	0	0	9V
0	0	1	12V
0	1	1	15V
0	1	0	20V

When using the level configuration mode, pay attention to the selection of IO port mode and default state.

For xg628, the input voltage of cfg1 pin shall not be higher than 8V, and the input voltage of CFG2 / cfg3 pin shall not be higher than 3.7V. When cfg1 uses the IO input high level of open drain pull-up mode, if its pull-up resistance is large, it may be determined as a single resistance configuration by xg628. Therefore, if the push-pull mode cannot be used to drive cfg1, additional pull-up resistance shall be added to ensure the pull-up driving capacity.

If the back-end circuit such as MCU starts slowly, cfg1 may be in floating state and request 20V before starting. If the system cannot bear 20V input, configuration resistance should be added to cfg1 pin to ensure that xg628 can request appropriate voltage before starting the back-end circuit.

5.3. Xg628 uses type-C female port with level configuration of 5 / 9 / 12 / 15 / 20V

CFG1	CFG2	CFG3	Adjust voltage output
1	-	-	5V
0	0	0	9V
0	0	1	12V
0	1	1	15V

Parameters

7.1. Absolute maximum value (critical or exceeding the absolute maximum value may cause abnormal operation or even damage of the chip)

name	Parameter description	Minimum value	Maximum value	unit
TA	Ambient temperature during operation	-40	90	℃
TS	Ambient temperature during storage	-55	105	℃
VDD	Working power supply voltage (VDD pin is connected to power supply, GND pin is connected to ground)	3.0	3.6	V
VIOHV	Supports the voltage on the high voltage pin (CFG, VBUS)	-0.5	13.5	V
VIOCC	Voltage on CC1, CC2, cfg1 pins	-0.5	8	V
VIOUX	Voltage on DP, DM, CFG, CFG2, cfg3 pins	-0.5	VDD+0.5	V
VIOLV	Voltage on cfghv pin		0.8	V
PD	Maximum power consumption of the whole chip (VDD voltage * current)		400	mW

7.2 Electrical parameters (test conditions: TA = 25 ℃, VDD = 3.3V)

name	Parameter description	Minimum value	Typical value	Maximum value	unit
VLDO	Internal power regulator VDD parallel voltage stabilization	3.24	3.3	3.36	V
ILDO	Internal power regulator VDD parallel current absorption capability	0		30	mA
TOTA	Reference threshold temperature of overtemperature protection module OTA	90	105	120	℃
VR	Voltage threshold of power on reset	2.2	2.4	2.6	V

8. Package information

Packaging type	Plastic body Order model		width Pin spacing		Package description	IC number
ESSOP10	3.9mm	150mil	1.00mm	39mil	Narrow 10 foot patch with base plate	XG628