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PDF STWLC04 Data sheet ( Hoja de datos )
| Número de pieza | STWLC04 | |
| Descripción | 1 W optimized wireless power receiver | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de STWLC04 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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STWLC04
Qi based, 1 W optimized wireless power receiver
Data brief
Configurable GPIO output
Rx coil NTC protection
Thermal protection
Low power dissipative rectifier overvoltage
clamp
Flip Chip 77 bumps (3.12x4.73 mm)
Applications
Wearable applications
Smart watches
Glasses
Medical and healthcare instrumentation
Features
Description
1 W output power
Qi 1.1 wireless standard communication
protocol based
Integrated high efficiency synchronous
rectifier
800 kHz programmable step-down converter
with input current and input voltage
regulation loop
The STWLC04 is an integrated wireless power
receiver suitable for wearable applications. The
device is designed for 1-watt power transfer
based on the Qi protocol, with digital control and
precise analog control loops ensuring stable
operation. The I2C interface allows a high degree
of customization and settings can be stored in the
embedded non-volatile memory.
Step-down converter efficiency up to 90%
The STWLC04 can deliver the output power in
Simplified Li-Ion/Polymer charger function
two modes: as a power supply with configured
32-bit, 16 MHz embedded microcontroller
with 16 kB ROM and 2 kB RAM memory
2 kB NVM for customization
Integrated driver for external supply switch
Precise voltage and current measurements
for received power calculation
output voltage or as a simple CC/CV battery
charger with configurable charging current,
charging voltage and termination current. The
STWLC04 can detect the external (wired) power
supply connection and drive an external power
switch.
I2C interface
Table 1: Device summary
Order code
Description
Package
Packing
STWLC04JR
Wearable optimized 1 W output
Flip Chip 77 bumps (3.12x4.73 mm)
Tape and reel
September 2016
DocID029626 Rev 2
For further information contact your local STMicroelectronics sales
office
1/18
www.st.com
1 page  
STWLC04
Pin name
VSUPS
RESL
VOUT
VFB
FBGND
LX
NTCRX
VA
VCORE
V5V
VIO
SCL
SDA
GPIO0
GPIO1
GPIO2
GPIO3
RESET
INT
RPGND
BPGND
GND
AGND
VEXT
SWDRV
USBOK
COMP
Pin configuration
Pin position
Description
A7, C6
Sensing terminal of the external current sensing resistor
A6 Sensing terminal of the external current sensing resistor
D5 Step-down output voltage
A5 Step-down feedback input
B6
Ground connection of the resistor feedback divider for step-down
converter
A11, B11, B10 Step-down converter coil connection
A3 Comparator input for RX coil temperature sensing
NTC thermistor has to be placed close to RX coil
LDO1 output to filtering capacitor. ADC supply and sensitive analog
A4 circuitries are connected to this LDO; any external circuit cannot be
connected to this node
LDO2 output to filtering capacitor. The microcontroller core and logic
F2 supply. VCORE voltage can be used as a reference voltage for the
RX coil NTC divider
A9, B9
LDO3 output to filtering capacitor
G1
VIO, power supply for the digital interface, can be connected to
VCORE or provided externally
D1 I2C clock input
D4 I2C data
D6
General purpose push-pull I/O pin. This function depends on firmware
configuration
E5
General purpose push-pull I/O pin. This function depends on firmware
configuration
E4
General purpose push-pull I/O pin. This function depends on firmware
configuration
E1
Open drain output only pin. This function depends on firmware
configuration
D2 Chip reset input, active low
C3 Open drain interrupt output to the host platform
D8, D9, D10,
D11
Rectifier power ground
C8, C9, C10,
C11
Step-down converter power ground
G2, F3
Digital ground
B4, C4, B5, C5
A10
Analog ground
Detection of the external power supply voltage – adapter/USB
voltage, 30 V spike tolerant
D7
External P-channel switch control to connect the adapter/USB voltage
to VOUT
C2 Digital input for the USBOK signal from platforms
C7 Step-down converter soft-start capacitor connection
DocID029626 Rev 2
5/18
5 Page 
STWLC04
Application information
All the above components refer to a typical application. Operation of the device is
not limited to the choice of these external components.
Figure 5: VIO and digital interface in standalone application schematic
DocID029626 Rev 2
11/18
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet STWLC04.PDF ] | |
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