USB Dedicated Charging Port Controller

Transcription

1 USB Dedicated Charging Port Controller DESCRIPTION AF9522 are dual channel USB dedicated charging port controller, it can auto-detect feature monitors USB data line voltage, and automatically provides the correct electrical signatures on the data lines to charge compliant devices among the following dedicated charging schemes: Divider 1 DCP, required to apply 2V and 2.7V on the D+ and D- lines respectively; Divider 2 DCP, required to apply 2.7V and 2V on the D+ and D- lines respectively; Divider 3 DCP, required to apply 2.7V and 2.7V on the D+ and D- lines respectively; BC1.2 DCP, required to short the D+ line to the D- line; Chinese Telecommunication standard YD/T shorted mode, required to short the D+ line to the D- line; 1.2V on both D+ and D- lines; FEATURES Dual USB port controller Operating range:4.5v to 5.5V Supports USB DCP shorting D+ line to D- line per USB battery charging specification, Revision 1.2(BC 1.2) Supports shorted mode(shorting D+ line to D- line) per Chinese Telecommunication industry Standard YD/T Supports USB DCP applying 2.7V on D+ line and 2V on D- line(or USB DCP applying 2V on D+ line and 2.7V on D- line) Supports USB DCP applying 2.7V on D+ line and 2.7V on D- line Supports USB DCP applying 1.2V on D+ and D- lines Automatically switch D+ and D- lines Available in SOT23-6 Package APPLICATIONS Vehicle USB Power charger AC-DC Adapter with USB Port Power Bank MID OTG Port Other USB Charger 1 / 6

2 PIN INFORMATION 1 DP1 DM1 6 2 GND V IN 5 3 DP2 DM2 4 AF95 22 PIN DESCRIPTION NO. NAME DESCRIPTION 1 DP1 2 GND Ground connection 3 DP2 4 DM2 5 VIN Power supply. Connect a ceramic capacitor with a value of 1μF or greater from the IN pin to GND as close to the device as possible. 6 DM1 TYPICAL APPLICATION CIRCUIT +4.5 V~+5.5V 2A V BUS DP DP1 GND DP2 DM1 V IN DM C1 1 uf DM1 DM2 AF95 22 DP2 2 / 6

3 Function BLOCK DIAGRAM ABSOLUTE MAXIMUM RATINGS Over recommended junction temperature range, voltages are referenced to GND (unless otherwise noted) PARAMETERS DESCRIPTION MIN MAX UNIT Voltage Range Operating Temperature Range VIN V DP1,DP2,DM1,DM2 output voltage, 0.3 VIN+0.3 V DP1,DP2,DM1,DM2 input voltage, 0.3 VIN+0.3 V TOP Junction Temperature TJ Storage Temperature Range TSTG Caution: Stresses beyond "Absolute Maximum Ratings" condition may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 3 / 6

4 ELECTRICAL CHARACTERISTICS (4.5 VIN 5.5, TA= 40~80, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT VIN voltage VIN V VIN POR voltage VIN_POR V VIN_POR_HYS 250 mv Operation current IVIN VIN=5V ua DP voltage VDP VIN=5V 2.7 V DM voltage VDM VIN=5V 2.0 V Output condition Output voltage=2.0v 30 kω ROUT resistance Output voltage=2.7v 23 kω Short Condition RDMDP 50 Ω resistance 4 / 6

5 FUNCTION DESCRIPTION As we all know, rechargeable portable equipment requires an external power source to charge its batteries. USB ports are convenient locations for charging because of an available 5V power source. Universally accepted standards are required to ensure host and client-side devices meet the power management requirements. Therefore, AF9522 are designed and can meet a variety of charging standard for USB port protocol. The AF9522 can support four of the most common protocols: USB Battery Charging Specification, Revision 1.2 (BC1.2).BC1.2 has three different port types, listed as follows. Standard downstream port (SDP) Charging downstream port (CDP) Dedicated charging port (DCP) Chinese Telecommunications Industry Standard YD/T Divider mode 1.2 V on both D+ and D lines DCP Auto-Detect The AF9522 are integrated an auto-detect feature to support divider mode, short mode and 1.2 V / 1.2 V modes. If adivider device is attached, 2.7 V is applied to the DP pin and 2 V is applied to the DM pin. If a BC1.2-compliantdevice is attached, the AF9522 automatically switches into short mode. If a device compliant with the 1.2 V / 1.2 V charging scheme is attached, 1.2 V is applied on both the DP pin and the DM pin. DCP auto-detect feature(dm2 and DP2 of AF9522) has the same functional configuration. Divide Mode Selection of 5W, 10W and 12W USB Charger The AF9522 meet three types of output power across the voltage value on DP pin and the DM pin. For 5W USB charger, the DP1 pin applying 2.7V on D+ line and DM1 PIN applying 2.0V on D- line, For 10W USB charger, the DP1 pin applying 2.0V on D+ line and DM1 PIN applying 2.7V on D- line, For 12W USB charger, the DP1 pin applying 2.7V on D+ line and DM1 PIN applying 2.7V on D- line,table 1shows different charging schemes for both 5W, 10W and 12W USB charger solutions. DP2 and DM2 of AF9522 also meet this three types of output power. Charger Type Part NO. DP1 DM1 DP2 DM2 5V_1A AF V_2A AF Table 1.Application Information 5 / 6

6 PACKAGE INFORMATION SOT / 6