bq51010B Highly Integrated Wireless Receiver Qi (WPC v1.1) Compliant Power Supply
- SLUSBB8A December 2012 – June 2016
  
  PRODUCTION DATA.

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DATA SHEET

bq51010B Highly Integrated Wireless Receiver Qi (WPC v1.1) Compliant Power Supply

1 Features

Integrated Wireless Power Supply Receiver Solution With a 7-V Regulated Supply
- 93% Overall Peak AC-DC Efficiency
- Full Synchronous Rectifier
- WPC v1.1 Compliant Communication Control
- Output Voltage Conditioning
- Only IC Required Between RX Coil and 7-V Output
WPC v1.1 Compliant (FOD Enabled) Highly Accurate Current Sense
Dynamic Rectifier Control for Improved Load Transient Response
Dynamic Efficiency Scaling for Optimized Performance Over Wide Range of Output Power
Adaptive Communication Limit for Robust Communication
Supports 20-V Maximum Input
Low-power Dissipative Rectifier Overvoltage Clamp (V_OVP = 15 V)
Thermal Shutdown
Multifunction NTC and Control Pin for Temperature Monitoring, Charge Complete and Fault Host Control

2 Applications

WPC v1.1 Compliant Receivers
Cell Phones and Smart Phones
Headsets
Digital Cameras
Portable Media Players
Hand-Held Devices

3 Description

The bq51010B is a family of advanced, flexible, secondary-side devices for wireless power transfer in portable applications. The bq51010B devices provide the AC-DC power conversion and regulation while integrating the digital control required to comply with the Qi v1.1 communication protocol. Together with the bq50xxx primary-side controller, the bq51010B enables a complete contact-less power transfer system for a wireless power supply solution. Global feedback is established from the secondary to the primary to control the power transfer process using the Qi v1.1 protocol.

The bq51010B devices integrate a low resistance synchronous rectifier, low-dropout regulator, digital control, and accurate voltage and current loops to ensure high efficiency and low power dissipation.

The bq51010B also includes a digital controller that can calculate the amount of power received by the mobile device within the limits set by the WPC v1.1 standard. The controller will then communicate this information to the transmitter to allow the transmitter to determine if a foreign object is present within the magnetic interface and introduces a higher level of safety within magnetic field. This Foreign Object Detection (FOD) method is part of the requirements under the WPC v1.1 specification.

Device Information ⁽¹⁾

PART NUMBER	PACKAGE	BODY SIZE (NOM)
bq51010B	DSBGA (28)	1.90 mm × 3.00 mm

For all available packages, see the orderable addendum at the end of the data sheet.

Wireless Power Consortium (WPC or Qi) Inductive Power System

4 Revision History

Changes from * Revision (December 2012) to A Revision

Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information sectionGo
Removed Package Summary, see POA at the end of the data sheetGo

5 Device Comparison Tables

DEVICE	FUNCTION	V_OUT (V_BAT-REG)	PROTOCOL	MAXIMUM P_OUT	I²C
bq51003	Wireless receiver	5 V	Qi v1.1	2.5 W	No
bq51013B	Wireless receiver	5 V	Qi v1.1	5 W	No
bq51010B	Wireless receiver	7 V	Qi v1.1	5 W	No
bq51020	Wireless receiver	4.5 to 8 V	Qi v1.1	5 W	No
bq51021	Wireless receiver	4.5 to 8 V	Qi v1.1	5 W	Yes
bq51221	Dual mode wireless receiver	4.5 to 8 V	Qi v1.1, PMA	5 W	Yes
bq51025	Wireless receiver	4.5 to 10 V	Qi v1.1 (in 5 W mode)	10 W	Yes
bq51020B	Wireless receiver and direct charger	4.2 V	Qi v1.1	5 W	No
bq51051B	Wireless receiver and direct charger	4.35 V	Qi v1.1	5 W	No
bq51052B	Wireless receiver and direct charger	4.4 V	Qi v1.1	5 W	No

Table 1. Device Options

DEVICE	FUNCTION	WPC VERSION	V_RECT-OVP	V_OUT-(REG)	OVER CURRENT SHUTDOWN	AD-OVP	TERMINATION	COMMUNICATION CURRENT LIMIT⁽¹⁾⁽²⁾
bq51010B	7-V power supply	v1.1	15 V	7 V	Disabled	Disabled	Disabled	Adaptive + 1s Hold-Off

(1) Enabled if EN2 is low and disabled if EN2 is high

(2) Communication current limit is disabled for 1 second at start-up

6 Pin Configuration and Functions

YFP Package

28-Pin DSBGA

Top View

Pin Functions

PIN		I/O	DESCRIPTION
NAME	NO.	I/O	DESCRIPTION
AC1	B3, B4	I	AC input from receiver coil antenna.
AC2	B1, B2	I	AC input from receiver coil antenna.
AD	G4	I	Connect this pin to the wired adapter input. When a voltage is applied to this pin wireless charging is disabled and AD_EN is driven low. Connect to GND through a 1-µF capacitor. If unused, capacitor is not required and must be grounded directly.
AD-EN	F3	O	Push-pull driver for external PFET connecting AD and OUT. This node is pulled to the higher of OUT and AD when turning off the external FET. This voltage tracks approximately 4 V below AD when voltage is present at AD and provides a regulated VSG bias for the external FET. Float this pin if unused.
BOOT1	C4	O	Bootstrap capacitors for driving the high-side FETs of the synchronous rectifier. Connect a 10-nF ceramic capacitor from BOOT1 to AC1 and from BOOT2 to AC2.
BOOT2	C1	O
CLMP1	E3	O	Open drain FETs are used for a non-power dissipative overvoltage AC clamp protection. When the RECT voltage goes above 15 V, both switches is turned on and the capacitors acts as a low impedance to protect the IC from damage. If used, Clamp1 is required to be connected to AC1, and Clamp2 is required to be connected to AC2 through 0.47-µF capacitors.
CLMP2	E2	O
COM1	E4	O	Open-drain output used to communicate with primary by varying reflected impedance. Connect through a capacitor to either AC1 or AC2 for capacitive load modulation (COM2 must be connected to the alternate AC1 or AC2 pin). For resistive modulation connect COM1 and COM2 to RECT through a single resistor; connect through separate capacitors for capacitive load modulation.
COM2	E1	O
EN1	G3	I	Inputs that allow user to enable or disable wireless and wired charging <EN1 EN2>: <00> wireless charging is enabled unless AD voltage > 3.6 V <01> Dynamic communication current limit disabled <10> AD-EN pulled low, wireless charging disabled <11> wired and wireless charging disabled.
EN2	G2	I
FOD	F2	I	Input for the received power measurement. Connect to GND with a 140-Ω resistor. See the FOD section for more detail.
ILIM	G1	I/O	Programming pin for the over current limit. Connect external resistor to VSS. Size R_ILIM with the following equation: R_ILIM = 314 / I_MAX where I_MAX is the expected maximum output current of the wireless power supply. The hardware current limit (IILIM) is 20% greater than IMAX or 1.2 x 1_MAX. If the supply is meant to operate in current limit use: R_ILIM = 314 / I_ILIM, R_ILIM = R1 + R_FOD
OUT	D1, D2, D3, D4	O	Output pin, delivers power to the load.
PGND	A1, A2, A3, A4	—	Power ground
RECT	C2, C3	O	Filter capacitor for the internal synchronous rectifier. Connect a ceramic capacitor to PGND. Depending on the power levels, the value may be 4.7 μF to 22 μF.
TS/CTRL	F1	I	Must be connected to ground through a resistor. If an NTC function is not desired connect to GND with a 10-kΩ resistor. As a CTRL pin pull to ground to send end power transfer (EPT) fault to the transmitter or pull-up to an internal rail (that is, 1.8 V) to send EPT termination to the transmitter. Note that a 3-state driver must be used to interface this pin (see the 3-State Driver Recommendations For the TS-CTRL Pin section for further description)
WPG	F4	O	Open-drain output – Active when the output of the wireless power supply is enabled.