TS51231
High Efficiency Transmitter Driver for
Wireless Power Systems
TRIUNE PRODUCTS
Features
•
•
•
•
•
Supports portable wireless charging applications
Wireless power systems up to 5W output
Integrated gate driver and output stage
Single pin control for switching the output stage
Low external component count
Description
The TS51231 is a transmitter driver and output stage for
wireless charging applications. The TS51231 can support
systems up to 5W output and proprietary applications.
Switching of the TS51231 is controlled by the wireless power
transmitter controller (TS80002 or similar).
Applications
•
Low-power wireless chargers for:
Smart Watches
Wearables
Toys
Portable Lighting
Medical Devices
Specification
•
16 pin 3x3 QFN
Typical Application Circuit
DC
Supply
Application
Processor
TS80002
+
TS51231
TS51221
Load
Transmitter
TS51231
Final Datasheet
March 27, 2015
Rev 1.0
Receiver
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Pin-out (Top view)
PGND
PGND
VIN
VIN
EN
SW
SDA
SW
SCL
BOOT
nFLT
PGND
Pin-out Configuration
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
TS51231
Final Datasheet
March 27, 2015
PGND
HSON
GND
VDD
Pin Symbol
EN
SDA
SCL
nFLT
PGND
HSON
VDD
GND
PGND
BOOT
SW
SW
PGND
PGND
VIN
VIN
PAD
Function
Enable
I2C Serial Data
I2C Serial Clock
Status
Power GND
Driver
Supply
GND
Power GND
Bootstrap Pin
Switching Node
Switching Node
Power GND
Power GND
Power Supply
Power Supply
Power PAD
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Description
Enable
I2C Serial Data
I2C Serial Clock
Fault Status
Power GND
Driver high-side control
Device Supply
Device GND
Power GND
Connected through 22nF capacitor to SW pin
Connected to transmitter coil
Connected to transmitter coil
Power GND
Power GND
Power Supply
Power Supply
Power GND
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Functional Block Diagram
nFLT
EN
VIN
MONITOR
&
CONTROL
Over & Under
Voltage
Protection
I²C
Interface
SCL
SDA
VIN
BOOT
Gate
Drive
Gate Drive
Control
C
IN
C
BOOT
Lcoil
HS ON
Input
Buffer
SW
Gate
Drive
C
OUT
PGND
VIN
VDD Regulator
VDD
C
VDD
GND
TS51231
Final Datasheet
March 27, 2015
Rev 1.0
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Absolute Maximum Ratings
Over operating free–air temperature range unless otherwise noted
(1, 2)
Parameter
VDD, EN, NFLT, SCL, SDA, VTHERM, VBAT
VIN
BOOT
SW
Electrostatic Discharge – Human Body Model
Electrostatic Discharge – Charge Device Model
Lead Temperature (soldering, 10 seconds)
(1)
(2)
Value
-0.3 to 5.5
-0.3 to 20
-0.3 to 25
-1 to 20
+/-2k
+/-500
260
Unit
V
V
V
V
V
V
O
C
Stresses beyond those listed under “absolute maximum ratings” 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 under “recommended operating conditions” is not implied. Exposure to
absolute–maximum–rated conditions for extended periods may affect device reliability.
All voltage values are with respect to network ground terminal.
Thermal Characteristics
Symbol
Θ
JA
Θ
JC
T
STG
T
J MAX
T
J
Parameter
Thermal Resistance Junction to Air (Note 1)
Thermal Resistance Junction to Case (Note 1)
Storage Temperature Range
Maximum Junction Temperature
Operating Junction Temperature Range
Value
33 - 36
1.2 - 3.9
-65 to 150
150
-40 to 125
Units
°C/W
°C/W
°C
°C
°C
Note 1: Assumes 16LD 3x3 QFN with hi-K JEDEC board and 13.5 inch2 of 1 oz Cu and 4 thermal vias connected to PAD
Recommended Operating Conditions
Symbol
VCC
LOUT
COUT
CIN
CVDD
CBOOT
Parameter
Input Operating Voltage
Transmitter Coil
Output Filter Capacitor
Input Bypass Capacitor
Internal Bypass Capacitor
Bootstrap Capacitor
Min
4.2
Typ
12
6.0
100
100
100
22
Max
16.5
Unit
V
µH
nF
nF
nF
nF
TS51231
Final Datasheet
March 27, 2015
Rev 1.0
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Electrical Characteristics (T=25
O
C unless otherwise specified)
Electrical Characteristics, TJ = -40C to 125C (unless otherwise noted)
Parameter
Output Stage
High Side Switch On Resistance
Low Side Switch On Resistance
Max Output Current
Over Current Detect
VDD LDO Output
LDO Output Voltage
LDO Output Current
Drop Out Voltage
Symbol
Conditions
Min.
Typ.
Max.
Units
RDSON
IOUT
IOCD
ISW = -1A, TJ=25C
ISW = 1A, TJ=25C
2.0
HS switch current
2.5
100
100
mΩ
mΩ
A
A
VLDO
ILDO
LDODO
Vin=5V, Iout=50mA
4.75
5.0
5.25
50
400
V
mA
mV
Functional Description
Switching of the TS51231 transmitter driver is controlled by the wireless transmitter controller via the HSON pin. When the HSON
pin is high, the high-side FET is switched on and the low-side FET is switched off. When the HSON pin is low, the high-side FET is
switched off and the low-side FET is switched on.
TS51231
Final Datasheet
March 27, 2015
Rev 1.0
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