Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsPMICsPMIC - ELCs WFQFN 16

This is information on a product in full production.

January 2014 DocID024711 Rev 5 1/33

STCC2540

USB charging controller with integrated power switch

Datasheet - production data

Features

 Compliant with USB charging specifications

BC1.2, USB 2.0 and USB 3.0 standards

 Compliant with Chinese telecommunications

industry standard YD/T 1591-2009

 Compatible with proprietary charging mode

(Apple

1 A / 2 A, BlackBerry

, Korean tablets)

 Wide bandwidth, low-loss USB 2.0 data switch

 Integrated V

BUS

power switch with low R

65 m

 Constant current mode overcurrent protection

 Soft-start to limit inrush current

 Adjustable current limit up to 2.8 A

 Short-circuit, thermal and undervoltage

protection

 Reverse voltage and reverse current protection

 Deglitched fault reporting output

 Supports remote wakeup in S3

 Charging indication output in DCP and CDP

modes

 Package: VFQFPN 16L 3 x 3 x 0.8 mm with

exposed pad

 Temperature range: -40 up to 85 °C

 UL and CB recognized components (UL file

number: E354278)

Applications

 USB ports / hubs

 Personal computers, all-in-one PCs

 Monitors

 Notebooks, ultrabooks

 Tablet PCs

 Universal wall charging adapters

Description

The STCC2540 device integrates, in one

package, a USB charger controller, a wide

bandwidth data switch and a high current power

switch. The device emulates several profiles

compatible with the USB battery charging

standard, BC1.2, Chinese telecommunications

standard YD/T 1591-2009, and proprietary

charger modes.

The device asserts the charging flag in DCP

modes if charging current is higher than

threshold. In CDP mode, it asserts the charging

flag after the CDP negotiation if charging current

is higher than threshold.

After the current drops below the threshold, the

output is deasserted, allowing the host to turn off

the high power DC-DC converter and reduce

overall consumption in S4/S5 states, critical when

the host is battery supplied.

VFQFPN 16L 3 x 3 x 0.8 mm

www.st.com

Summary of content (33 pages)

PAGE 1
STCC2540 USB charging controller with integrated power switch Datasheet - production data Applications  USB ports / hubs  Personal computers, all-in-one PCs  Monitors  Notebooks, ultrabooks  Tablet PCs VFQFPN 16L 3 x 3 x 0.8 mm  Universal wall charging adapters Description Features  Compliant with USB charging specifications BC1.2, USB 2.0 and USB 3.
PAGE 2
Contents STCC2540 Contents 1 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 7 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 Application information . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 3
STCC2540 List of figures List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Figure 21. Figure 22. Figure 23. Figure 24. Figure 25. Figure 26. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Pinout . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 4
Functional description 1 STCC2540 Functional description The STCC2540 device integrates, in one package, a complete solution to charge portable devices through USB ports, including:  Charger emulator compatible with USB battery charging BC1.2 standard, Chinese telecommunications standard YD/T 1591-2009 and proprietary charger such as Apple® divider mode, BlackBerry® and Korean tablet charging mode.  3 control pins, CTL1, CTL2, CTL3 allowing the host to select the emulation profile.
PAGE 5
STCC2540 Functional description Figure 1. Block diagram 86% GDWD VZLWFK '3B287 '0B287 '3B,1 '0B,1 (PXODWLRQ SURILOHV 9,1 )$8/7 7KHUPDO FRQWURO &+$5*,1* ,/,0 (1 &7/ &7/ &7/ 9,1 89/2 /RJLF FRQWURO 5HYHUVH FXUUHQW 9,1 9,1 3RZHU VZLWFK ,1 287 2XWSXW GLVFKDUJH *1' $0 9 Figure 2.
PAGE 6
Pin description 2 STCC2540 Pin description Table 1. Pin description Pin no. Name 1 IN 2, 3 DM_OUT, DP_OUT I/O 4 NC - No connect 5 EN I Logic level control input. When EN is low, power switch, data switch and emulator are OFF. 6, 7, 8 CTL1, CTL2, CTL3 I Logic level control inputs to select charger mode (see Table 5 on page 13). 9 CHARGING O Active low open drain output, asserted when charging current is detected. 10, 11 DP_IN, DM_IN I/O USB 2.
PAGE 7
STCC2540 3 Absolute maximum ratings and operating conditions Absolute maximum ratings and operating conditions Stressing the device beyond the rating listed in Table 2: Absolute maximum ratings (AMR) may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated in Table 3: Operating conditions is not implied.
PAGE 8
Electrical characteristics 4 STCC2540 Electrical characteristics Table 4. Electrical characteristics VIN = 4.5 to 5.5 V, -40 °C < TJ < 125 °C (unless otherwise specified) Symbol Parameter Conditions Min. Typ. Max. Unit Current consumption IACTIVE IDISABLED Mode CDP (111) 110 160 Mode SDP (110 - 010) 100 150 260 110 290 180 Mode DCP BC1.2 (100) 110 180 Mode DCP divider (101) 210 290 EN = 0, TJ = 25 °C 0.
PAGE 9
STCC2540 Electrical characteristics Table 4. Electrical characteristics VIN = 4.5 to 5.5 V, -40 °C < TJ < 125 °C (unless otherwise specified) (continued) Symbol Parameter Conditions FAULT output leakage current VIN = 5.5 V, VFAULT = 5 V tFAULT FAULT output deglitch delay FAULT assertion / deassertion delay in overcurrent condition VUVLO Undervoltage lockout VIN rising VHYST(UVLO) Undervoltage lockout hysteresis TJ = 25 °C IOL(FAULT) Min. Typ. Max. Unit 1 µA 7 9 12 ms 3.9 4.1 4.
PAGE 10
Electrical characteristics STCC2540 Table 4. Electrical characteristics VIN = 4.5 to 5.5 V, -40 °C < TJ < 125 °C (unless otherwise specified) (continued) Symbol Parameter Conditions Min. Typ. Max. Unit Charger emulator - divider mode VDM DM_IN output voltage VDP DP_IN output voltage RDM DM_IN output resistance RDP DP_IN output resistance Device set to DCP auto-detect mode or divider mode, VIN = 5.0 V 1.96 2 2.04 V 2.65 2.7 2.
PAGE 11
STCC2540 Electrical characteristics Table 4. Electrical characteristics VIN = 4.5 to 5.5 V, -40 °C < TJ < 125 °C (unless otherwise specified) (continued) Symbol Parameter Conditions Min. Typ. Max. Unit Charger emulator - control pins CTLx VCTLx CTLx pins threshold voltage VHYST(CTLx) Hysteresis voltage on CTLx pins Leakage current ICTLx 0.4 1.6 V 500 VIN = 5.
PAGE 12
Application information 5 STCC2540 Application information The STCC2540 device is designed to be implemented into the PC on a USB port in order to emulate the wall charger adapter when the PC is in standby mode or OFF, and to allow higher charge current when the USB interface is used for data communication. In order to handle these functionalities, the STCC2540 device relies on USB BC1.2 specifications, Chinese telecommunications industry standard YD/T 1591-2009 and proprietary implementations.
PAGE 13
STCC2540 Application information 5.1 Supported modes For more information refer to Section 5.4: State machine. The STCC2540 device supports the following modes:  SDP BC1.2  CDP BC1.2  SDP with remote wakeup for all USB devices  CDP with remote wakeup for low-speed USB devices with automatic transition to DCP auto mode if a full-speed/high-speed USB device attached or after a USB device detached  DCP auto-detect: this mode permits auto-detection of charging modes between DCP BC1.
PAGE 14
Application information 5.2 STCC2540 Remote wakeup in S3 For more information refer to Section 5.4: State machine. If the CTLx pins are controlled by hardware signals (such as SLP_Sx# or SUSPEND), the CTLx combination changes when host transitions from S0 to S3 and back. In this case, the STCC2540 device can support remote wakeup of portable devices for the following transitions (i.e.
PAGE 15
STCC2540 5.4 Application information State machine Figure 5.
PAGE 16
Application information 5.5 STCC2540 Charging detection The STCC2540 device continuously monitors current drawn by the portable device. While programmed in CDP or DCP mode, the STCC2540 device sends a charging flag to the system if the current through the USB power switch is above the charging threshold, set at 20 mA typ.: open drain active low output CHARGING is asserted.
PAGE 17
STCC2540 Application information FAULT functionality The FAULT open drain active low output is asserted during overcurrent or overtemperature conditions. Signal is asserted until the fault is removed. For overcurrent conditions, the STCC2540 device is designed to eliminate false FAULT reporting, by using an internal deglitch delay (9 ms typ.). In the case of overtemperature, there is no deglitch delay and the FAULT signal is asserted immediately.
PAGE 18
Application information 5.8 STCC2540 Input and output capacitors For proper functionality the STCC2540 device requires 1 F decoupling ceramic capacitors CIN and COUT (see Figure 4 on page 12). These capacitors should be placed as close as possible to the corresponding pins. The electrolytic capacitor CVBUS (see Figure 4) is required by the USB specification to suppress the voltage and current transients caused by hot plugging/unplugging the peripheral devices.
PAGE 19
STCC2540 Typical operating characteristics Figure 6. Power switch ON resistance vs. temperature 521 ,1 287 -XQFWLRQ WHPS HUDWXUH >¡&@ $0 Figure 7. OUT discharge resistance vs.
PAGE 20
Typical operating characteristics STCC2540 Figure 8. OUT short-circuit current limit vs. temperature (RILIM = 96 k) , 26 >P$@ -XQFWLRQ WHPS HUDWXUH >Σ&@ $0 Figure 9. OUT short-circuit current limit vs.
PAGE 21
STCC2540 Typical operating characteristics Figure 10. OUT short-circuit current limit vs. temperature (RILIM = 19.6 k) , 26 >P$@ -XQFWLRQ WHPS HUDWXUH >Σ&@ $0 Figure 11. Disabled IN supply current vs.
PAGE 22
Typical operating characteristics STCC2540 Figure 12. Enabled IN supply current vs. temperature (SDP mode) ,,1 $&7,9( 6'3 > $@ -XQFWLRQ WHPS HUDWXUH >Σ&@ $0 Figure 13. Enabled IN supply current vs.
PAGE 23
STCC2540 Typical operating characteristics Figure 14. Enabled IN supply current vs. temperature (DCP auto-mode) ,,1 $&7,9( '&3 DXWR > $@ -XQFWLRQ WHPS HUDWXUH >Σ&@ $0 Figure 15. Enabled IN supply current vs. temperature (DCP BC1.
PAGE 24
Typical operating characteristics STCC2540 Figure 16. Enabled IN supply current vs. temperature (DCP divider mode) ,,1 $&7,9( '&3 GLYLGHU > $@ -XQFWLRQ WHPS HUDWXUH >Σ&@ $0 Figure 17. Data switch transfer characteristics vs.
PAGE 25
STCC2540 Typical operating characteristics Figure 18. Eye diagram using USB compliance test pattern - without STCC2540 (deskew line + cable) Figure 19.
PAGE 26
Typical operating characteristics STCC2540 Figure 20. Turn-on response (RILIM = 20 k, RLOAD = 5 , CLOAD = 150 µF) Figure 21.
PAGE 27
STCC2540 Typical operating characteristics Figure 22. Device enabled into short-circuit (RILIM = 80.6 k) Figure 23.
PAGE 28
Typical operating characteristics STCC2540 Figure 24.
PAGE 29
STCC2540 7 Package information Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ECOPACK is an ST trademark. Figure 25. VFQFPN 16L 3 x 3 x 0.8 mm with exposed pad 1.
PAGE 30
Package information STCC2540 Table 6. VFQFPN 16L 3 x 3 x 0.8 mm with exposed pad 1.7 package mechanical data(1), (2), (3), (4) Dimensions Symbol Data book (mm) Notes Nom. Min. Max. A 0.75 0.70 0.80 A1 0.02 0 0.05 A3 0.20 b 0.25 0.18 0.30 D 3 2.90 3.10 D2 1.70 1.50 1.80 E 3 2.90 3.10 E2 1.70 1.50 1.80 e 0.50 L 0.40 0.30 0.50 (5) 1. VFQFPN - standard for “thermally enhanced very thin fine pitch quad flat package no leads”. 2.
PAGE 31
STCC2540 8 Ordering information Ordering information Table 7.
PAGE 32
Revision history 9 STCC2540 Revision history Table 8. Document revision history Date Revision 29-May-2013 1 Initial release. 2 Updated Features on page 1 (added “CB” components). Updated Section 1: Functional description (replaced 1000 MHz by 1100 MHz). Updated Table 2 (added note 3.). Updated Table 4 (updated parameters and conditions for │IREVERSE│, IEN, IOL(FAULT), ICTLx, IOL(CHARGING), added typ. value for XTALK, OIRR, and Bw, removed tPD and tSK symbols). Added Figure 4 on page 12.
PAGE 33
STCC2540 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.