STUSBCD01B USB charger detection interface Features ■ Capable of detecting dedicated USB chargers and host chargers (current sink and dedicated methods) ■ Operates with VBAT supply voltage ranging from 2.2 V to 4.5 V ■ Active high open drain hardware detection pin (DETECT) ■ GPIO control interface ■ 1.6 V - 2.8 V interface voltage range (VIO) ■ VBUS voltage 6 V clamping circuit ■ Low DP-DM input capacitance ■ ESD: HBM ± 2 kV, CDM 500 V on every pin ■ 12 bumps Flip-Chip package, 1.6 x1.2 mm, pitch 0.4 mm, max thickness 0.60 mm, Halogen free RoHS compliant package Operation is controlled through three general purpose I/O pins; a hardware open drain detection output is also available. An internal regulator provides the 1.8 V supply voltage for the internal blocks and state machine while a clamping device prevents VBUS voltage from going over 6 V (typ.). Applications ■ Mobile phones ■ PDAs, MP3 players Flip-Chip 12 (1.6 x 1.2 mm) The STUSBCD01B is available in a 12 bumps Flip-Chip 0.4 mm pitch package. Description The STUSBCD01B is a USB charger detection IC which can detect dedicated USB chargers, Host/Hub chargers or standard host ports connected to the USB DP/DM data lines. The device implements two different detection methods in order to be able to distinguish between a dedicated charger and a Host/Hub charger. Table 1. Device summary Order code Package Packaging STUSBCD01BJR Flip-Chip 12 (1.6 x 1.2 mm) 3000 parts per reel November 2008 Rev 1 1/19 www.st.com 19 Contents STUSBCD01B Contents 1 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.1 Detection methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.2 Dedicated charger detection method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.3 Current sink method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3.4 Detection triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.5 VBUS clamping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.6 Internal regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 Functional tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 Timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2/19 STUSBCD01B 1 Application Figure 1. Application circuit Application 3/19 Pin configuration STUSBCD01B 2 Pin configuration Figure 2. Bump configuration (top through view) Table 2. Pin description Bump name Symbol Type C3 VBAT PWR Analog supply voltage input (2.2 V - 4.5 V) C2 GND PWR Ground reference A3 VIO PWR Digital interface supply voltage (1.6 V - 2.8 V) B4 DP AI/O Connected to USB D+ Data line A4 DM AI/O Connected to USB D- Data line B2 DETECT O Hardware detection pin (open drain). 300 kΩ internal pull-down resistor. VBAT referred. A2 SHUTDOWN I Standby mode selection pin. Active HIGH. Terminates the detection and resets the device. A1 /OE I Output enable for DETECT output. Active LOW. B1 STATUS/ METHOD AI/O B3 DEFAULT METHOD AI Hardware selection for detection method. Active only if VIO is not present. Dedicated method is selected if driven low, current sink method if driven high. VBAT referred. Do not leave floating to avoid increased power consumption. C4 VBUS AI VBUS voltage comparator input. Triggers the charger detection. 6V limited voltage when 10 V are applied externally. C1 1V8V O Regulator output voltage. Bypass capacitor not required. 4/19 Description SW detection output: High when Charger detected. Pulled high or low through internal weak pull-up to 1V8V and weak pull-down. Detection method selection input: low for dedicated method, high for current sink method. STUSBCD01B 3 Functional description Functional description The STUSBCD01B is designed to provide USB charger detection functionality to USB platforms which do not have this feature integrated in the PHY. The device can work with a supply voltage ranging from 2.2 V to 4.5 V and has an internal regulator which generates the 1.8 V voltage required for the internal blocks and state machine. The STUSBCD01B can detect a dedicated charger or a Host/Hub charger connected to USB data lines and provides both an open drain pin and a digital I/O pin for the detection output signal. The open drain output can be disabled using the /OE input signal. Two different detection methods, selectable through the STATUS/METHOD pin, are implemented in order to distinguish between a dedicated charger and a Host/Hub charger. If the interface voltage is not present the detection method is defined by the status of default method pin. The STUSBCD01B features very low power consumption in Standby mode and low input capacitance on DP/DM pins. An over voltage protection circuit is also implemented on the VBUS pin in order to limit VBUS voltage to 6 V and provide protection to external devices connected to it. 3.1 Detection methods The STUSBCD01B implements a current source/sink method to detect dedicated chargers (wall chargers) and a current sink method for Host/Hub chargers (based on USB battery charging spec v1.0). If a standard Host/Hub is connected to the device it is recognized thanks to its pull-down resistors on DP/DM lines and therefore DETECT/STATUS outputs will be low. 3.2 Dedicated charger detection method Selected driving method pin low during the falling edge of shutdown or driving default method pin low if VIO is not present. The dedicated charger detection method uses a current source on DP pin and a current sink on DM pin to detect the resistor (max 200 Ω) which connects DP and DM in dedicated chargers. 3.3 Current sink method Selected driving method pin high during the falling edge of shutdown or driving default method pin high if VIO is not present. A voltage source of VDAT_SRC is connected to DP and a current of IDAT_SINK is drawn from DM. If a Host/Hub charger is connected, STUSBCD01B will see a voltage of VDAT_SRC on pin DM. The same happens if a dedicated charger is connected and, therefore, in order to distinguish between the two, if the current sink method detection is successful it is necessary to run the dedicated charger detection method immediately after. 5/19 Functional description 3.4 STUSBCD01B Detection triggering USB Charger detection automatically starts when VBUS voltage is over VTH_VBUS threshold and shutdown input is low. If VBUS drops under VTH_VBUS threshold or shutdown input is pulled high, the charger detection is immediately terminated. If no charger is detected (DETECT = 0 and /OE = 0), VBUS voltage is kept over VTH_VBUS threshold and VIO is not present then a new detection is started every 1 s. If a charger is detected, detect and status pins are kept high until VBUS drops under VTH_VBUS threshold or a new detection is started. Any hardware detection (VIO not present) is terminated as soon as VIO voltage rises above VTH_IO threshold. 3.5 VBUS clamping The STUSBCD01B features a built in over voltage protection circuit which prevents VBUS voltage from going over 6 V. The device is able to withstand continuous voltages of up to 10 V applied to VBUS pin through an external resistor; in this case the clamping circuit limits the voltage to 6 V within 1 µs. A 470 Ω resistor in series between VBUS voltage and VBUS pin is required. Any external device needing VBUS over-voltage protection must be connected to STUSBCD01B's VBUS pin. Minimum input resistance for VBUS pin in normal operating conditions (up to ~ 5.3 V) is 400 kΩ. 3.6 Internal regulator The STUSBCD01B has an internal regulator which outputs 1.8 V (nominal) to supply internal blocks. The regulator does not require any bypass capacitor for stability. 6/19 STUSBCD01B Figure 3. Functional description Functional diagram 7/19 Functional tables STUSBCD01B 4 Functional tables Table 3. Operating mode SHUTDOWN /OE VIO VBAT VBUS STATUSDETECT X X X Not available X X X (1) Operating mode Power down Standby (SW control) H X Available Available Not available - - Not available Available Not available L Standby (NO SW control) L X Available Available Available L Active, SW detection - - Not available Available Available L Active, HW detection 1. Low when value is not forced by controller. Table 4. Output signals VIO Shutdown Detection result /OE Status/Method Detect Available L Charger detected L H (pull up active) Active (driving to VBAT) Available L Charger detected H H (pull up active) L (internally pulled down) Available L Charger not detected X L (pull down active) L (internally pulled down) Available H - X Input L (internally pulled down) Not available - Charger detected - Undefined Active (driving to VBAT) Not available - Charger not detected - Undefined L (internally pulled down) Table 5. Note: 8/19 Pin states during detection Detection method DP DM Dedicated Outputs IDCH_SRC Sinks IDAT_SINK Current sink Outputs VDAT_SRC Sinks IDAT_SINK See timing diagrams for more details. STUSBCD01B Maximum ratings 5 Maximum ratings Table 6. Absolute maximum ratings (1) Symbol Value Unit Battery supply voltage 6 V USB VBUS voltage 6 V USB VBUS voltage with external 470 Ω resistor 12 V DP, DM, DETECT, DEFAULT METHOD Detection pins 6 V VX All other pins -0.5 to 4.6 V Storage temperature range -65 to +150 °C Electrostatic discharge voltage (according to HBM JESD22-A114D) ±2 kV Electrostatic discharge voltage (according to CDM JESD22-C101C) 200 V VBAT VBUS TSTG ESD (2) Parameter 1. Exceeding the absolute maximum rating may damage the device. 2. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5 kΩ in series with 100 pF. Note: Absolute maximum ratings are those values above which damage to the device may occur. Functional operation under these conditions is not implied. All voltages are referenced to GND. Table 7. Recommended operating conditions (1) Symbol VBAT VIO VBUS Parameter Min. Typ. Max. Unit Analog supply voltage 2.2 4.2 4.5 V Interface supply voltage 1.5 1.8 2.8 V 5.25 V VBUS voltage 0 1. The device is not guaranteed to function outside its operating rating. 9/19 Electrical characteristics STUSBCD01B 6 Electrical characteristics Table 8. DC electrical characteristics (power supply and digital I/O pins) (1) (VBAT = 4.2 V, TA = 25°C, specifications over temperature, -40 to 85 °C) Symbol Parameter 1V8V LDO regulated voltage output VBAT supply current IBAT VIO supply current IIO Test conditions Min. Typ. Max. Unit VBUS > VTH_VBUS, VBAT = 2.2V to 4.5V 1.76 1.8 1.84 V VBAT = 2.2 to 4.5V; Standby mode 20 µA VBAT = 2.2 to 4.5V; Detection 1 mA STATUS/METHOD=”open” 5 µA VIO detection threshold voltage VTH_IO 1 V VIL Low level input voltage (Note 1) VIO = 1.6 to 2.8V VIH High level input voltage (Note 1) VIO = 1.6 to 2.8V VILDM Low level input voltage (Note 2) VIHDM High level input voltage (Note 2) IIL Low level input leakage (SHUTDOWN, /OE) VIO = 1.6 to 2.8V, all inputs at GND ±5 µA IIH High level input leakage (SHUTDOWN, /OE) VIO = 1.6 to 2.8V, all inputs at VIO ±5 µA VOL Low level output voltage (STATUS) IOL = +10µA, VIO = 1.8V 0 100 mV VOH High level output voltage (STATUS) IOH = -10µA, VIO = 1.8V 1.7 1.8 V CIN Input capacitance (Note 1) 0.15 VIO 0.85 VIO V 0.15 VBAT 0.85 VBAT 10/19 V V 4 1. Characterized specification(s), but not production tested. Note: V 1 Specification applies to the following pins: /OE, SHUTDOWN, STATUS/METHOD 2 Specification applies to DEFAULT METHOD pin. pF STUSBCD01B Table 9. Electrical characteristics DC electrical characteristics (analog pins) (VBAT = 4.2 V, TA = 25 °C, specifications over temperature, -40 to 85 °C) Symbol Parameter VBUS VBUS voltage IVBUS VBUS current Test conditions Typ. Max. Unit 5.25 V 10 µA 5.3 6 V 2 4 V 0 VBUS=0 to 5.25V VBUS_CLMP VBUS clamping voltage REXT = 470Ω VTH_VBUS VBUS voltage detection threshold ZIN_VBUS VBUS input impedance CIN Min. VBUS max 5.25V 400 kΩ DP, DM input capacitance (1) VDAT_SRC Data source voltage IDP=IDAT_SRC VDAT_REF Data detect voltage IDAT_SINK Data sink current IDCH_SRC Dedicated charger detection DP source current (2) DP low threshold ZPD_DET DETECT pin pull down impedance /OE=1 VOH_DET DETECT output driving voltage pF 0.7 V 0.25 0.34 V 50 100 µA 15 30 µA 0.615 VDM=VDAT_SINK (3) VTHDPL 5 0.65 0.6 240 IOH_DET = 0.5mA, VBAT = 2.2 to 4.5V 300 VBAT–0.2 V 360 kΩ VBAT V 1. Measured at DP pin. Includes effect of internal switches. 2. IDAT_SRC = 0 to 200 µA according to USB specs. 3. VDAT_SINK = 0.15 V to 3.6 V according to USB specs. Table 10. AC electrical characteristics (1) (VBAT = 4.2 V, TA = 25 °C, specifications over temperature, -40 to 85 °C) Symbol Parameter Max. Unit 5 8 ms Current sink method 100 170 ms Current sink method 20 40 ms DP source off to DETECT high time Current sink method 40 70 ms VDAT_SRC on delay Current sink method 5 8 ms TVBUS_DET_CS VBUS attach to DETECT high time Current sink method 150 270 ms TVBUS_DET_DC VBUS attach to DETECT high time Dedicated charger method 145 248 ms Dedicated charger method 140 240 ms TVBUS_DBNC VBUS debounce time TDP_SRC_ON DP source on time TCHGR_DET_DBNC Charger detect debounce TDPSRC_HICRNT TD_VDAT (2) Test conditions Min. Typ. TIDCH_SRC_ON IDCH_SRC on time TIDAT_SINK_ON IDAT_SINK on time Dedicated charger method 40 70 ms IDCH_SRC on to IDAT_SINK on delay Dedicated charger method 100 170 ms Periodic detection period Hardware detection, No charger 1 1.6 s Minimum pulse width High/Low All digital inputs 2 TD_IDAT_SINK TPER_DET TW_H/L µs 1. All AC parameters guaranteed by design but not production tested. 2. TIDCH_SRC_ON = TD_IDAT_SINK + TIDAT_SINK_ON 11/19 Timing diagrams STUSBCD01B 7 Timing diagrams Figure 4. Current sink method (with charger connected) VBUS+ VBUS VBUS- TVBUS_DBNC 5ms TD_VDAT TDP_SRC_ON 5ms TVBUS_DBNC >100ms VDAT_SRC 0.615-0.7V IDAT_SINK 50-100µA Applied to DP Applied to DM DM_SRC Either returned VDAT_SRC if dedicated charger or applied VDAT_SRC by HOST charger TDM_SRC_EN TDM_SRC_DIS <20ms <20ms VDAT_DET VDAT_DET (comparator output, see Functional Diagram) must be high for >20ms for charger detection to be valid >20ms TCHGR_DET_DBNC >40ms 150ms < TVBUS_DET_CS < 270ms DETECT 12/19 TDPSRC_HICRNT 5ms STUSBCD01B Figure 5. Timing diagrams Dedicated charger detection method (with charger connected) VBUS+ VBUS VBUS- TVBUS_DBNC TIDCH_SRC_ON IDCH_SRC TVBUS_DBNC 15-30µA Applied to DP TD_IDAT_SINK TIDAT_SINK_ON 50-100µA IDAT_SINK Applied to DM DP DM 145ms < TVBUS_DET_DC < 248ms DETECT 13/19 Package mechanical data 8 STUSBCD01B Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. 14/19 STUSBCD01B Package mechanical data Flip-Chip 12 mechanical data mm. mils. Dim. Min. Typ. Max. Min. Typ. Max. A 0.52 0.56 0.60 20.5 22.0 23.6 A1 0.17 0.20 0.23 6.7 7.9 9.1 A2 0.35 0.36 0.37 13.8 14.2 14.6 b 0.23 0.26 0.29 9.1 10.2 11.4 D 1.543 1.593 1.643 60.7 62.7 64.7 D1 E 1.20 1.15 1.202 47.2 1.25 45.3 47.3 E1 0.80 31.5 e 0.40 15.7 SE 0.20 7.9 49.2 Bottom view 0.075 Top view 7504892-D 15/19 Package mechanical data STUSBCD01B Tape & reel Flip-Chip 12 mechanical data mm. inch. Dim. Min. Typ. A Min. Typ. 180 13.2 Max. 7.087 C 12.8 D 20.2 0.795 N 60 2.362 T 16/19 Max. 0.504 0.520 14.4 0.567 Ao 1.43 1.48 1.53 0.056 0.058 0.060 Bo 1.71 1.76 1.81 0.067 0.069 0.071 Ko 0.75 0.80 0.85 0.030 0.031 0.033 Po 3.9 4.1 0.154 0.161 P 3.9 4.1 0.154 0.161 STUSBCD01B Figure 6. Package mechanical data Footprint data (mm.) 17/19 Revision history STUSBCD01B 9 Revision history Table 11. Document revision history Date Revision 18-Nov-2008 1 18/19 Changes Initial release. STUSBCD01B Please Read Carefully: Information in this document is provided solely in connection with ST products. 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