TS51111
High Efficiency Synchronous Rectifier and
Charging IC for Wireless Power Applications
TRIUNE PRODUCTS
Features
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High efficiency synchronous rectification of AC input
Supports both Direct and Indirect Charging applications
Supports WPC Qi® compliant and non-compliant systems
Low Rds-on rectifier switches
High voltage input for higher power systems
Up to 20W+ Output
>98% efficiency at high currents
Integrated switches for load modulation
Integrated switch for battery disconnect
Integrated precharge current source
50mA output low Iq LDO
Analog mux for ADC sensing
Supply Under Voltage Lockout
Low external component count
Ultra-low standby quiescent current
Junction operating temperature -40C to 125C
Description
The TS51111 is a fully-integrated synchronous rectifier for wireless
charging applications with additional integrated components to
minimize system BOM.
The TS51111 includes a high efficiency synchronous rectifier to
convert the input AC power signal to a DC output level for battery
charging. The device supports both direct battery charging and
indirect power applications. Low Rds-on switches minimize power
dissipation. High voltage input capability allows for simple and
robust secondary side charger implementation. An integrated switch
provides the battery charging path and combined with the rectifier
provides back feed protection to the AC inputs. A precharge current
source is also included for low battery voltage precharge operation.
Communication capability is achieved using integrated high voltage
switches.
The TS51111 includes several additional modules to allow simple
integration into wireless power systems. Integrated resistor dividers
with zero-current off-mode allow external ADC measurement of
PDC, PACKP, USB and thermistor voltages. High voltage switches are
included for communication modulation.
Power to an external controller is provided through an integrated
LDO. The ultra-low quiescent current regulator can supply high
output currents at low dropout with minimal current draw from the
battery.
Available in a 45 pin WCSP and 36 pin 6x6 QFN package.
Applications
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Cell Phones and Smart Phones
Tablet Computers
eReaders
Laptop Computers
Small Digital Cameras
Portable Video Recorders
Wireless charging for portable devices
TS51111
Final Datasheet
April 17, 2015
Rev 2.2
www.semtech.com
1 of 22
Semtech
Proprietary & Confidential
Pin Description (WCSP)
Pin #
A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
D1
D2
D3
D4, D5
E1
E2-5
F1-F3
F4, F5
G1
G2-5
H1-H3
H4, H5
I1-5
Pin Name
SCL
AMUX
AGND
MOD1
MOD2
SDA
VREF
PACKN
USB
EN_MOD
VCORE
THERM
UART
TXD
PACKS
BST1
OVP
RXD
PACKP
BST2
PDC
VAC2
VAC1
VACDET
PGND
VAC2
VAC1
PDC
Pin Function
I2C Clock
Analog Sense
Analog Ground
MOD cap connection
MOD cap connection
I2C Data
Vref Output
PACKN Sense
USB Supply
Enable Modulation
VCORE LDO
Thermistor Drive
UART Bus
UART TX
Output Current Sense
BST cap
OV Clamp
UART RX
Battery Connection
BST cap
Input power
Coil input
Coil input
VAC Detect
Power gnd
Coil input
Coil input
Rectified voltage
Description
I2C clock
Analog MUX output
Quiet ground connection
Pulldown for capacitive modulation
Pulldown for capacitive modulation
I2C data
ADC reference output
Battery negative terminal
USB supply and detection input
Enables modulation switches
LDO output
Thermistor drive
UART bus
UART Tx
Sense node for output current
Boost capacitor connection for HS FETs
Overvoltage pulldown clamp
UART Rx
Battery positive terminal
Boost capacitor connection for HS FETs
Rectified input signal
AC power input from coil
AC power input from coil
Indicates incoming power to external micro
GND for synchronous rectifier and charging path
AC power input from coil
AC power input from coil
Filter capacitor connection for rectified voltage
TS51111
Final Datasheet
April 17, 2015
Rev 2.2
www.semtech.com
3 of 22
Semtech
Proprietary & Confidential
Pin Description (QFN)
Pin #
1
2
3
4
5
6
7, 13-14
8, 11-12
9-10, 17-18
15-16, 20
19
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
Pin Name
EN_MOD
TXD
RXD
PACKS
PACKP_K
PACKP
PDC
VAC1
PGND
VAC2
VAC_DET
OVP
BST2
BST1
VCORE
THERM
SDA
SCL
NC
VREF
AMUX
UART
PACKN
AGND
MOD1
MOD2
USB
Pin Function
Enable Modulation
UART TX
UART RX
Output Current Sense
PACKP Kelvin
Battery Connection
Rectified voltage
Coil input
Power gnd
Coil input
VAC Detect
OV Clamp
BST cap
BST cap
VCORE LDO
Thermistor Drive
I2C Data
I2C Clock
No Connect
Vref Output
Analog Sense
UART Bus
PACKN Sense
Analog Ground
MOD cap connection
MOD cap connection
USB Supply
Description
Enables modulation switches
UART Tx
UART Rx
Sense node for output current
PACKP Kelvin
Battery positive terminal
Filter capacitor connection for rectified voltage
AC power input from coil
GND for synchronous rectifier and charging path
AC power input from coil
Indicates incoming power to external micro
Overvoltage pulldown clamp
Boost capacitor connection for HS FETs
Boost capacitor connection for HS FETs
LDO output
Thermistor drive
I2C data
I2C clock
No Connect
ADC reference output
Analog MUX output
UART bus
Battery negative terminal
Quiet ground connection
Pulldown for capacitive modulation
Pulldown for capacitive modulation
USB supply and detection input
TS51111
Final Datasheet
April 17, 2015
Rev 2.2
www.semtech.com
5 of 22
Semtech
Proprietary & Confidential
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