P9030-EVK IDT, P9030-EVK Datasheet - Page 15

• Manufacturer Part Number: P9030-EVK
• Description: Power Management IC Development Tools
• Manufacturer: IDT
• Type: PMIC Solutionsr

Specifications of P9030-EVK

• Product: Evaluation Kits
• Tool Is For Evaluation Of: P9030
• Input Voltage: 10 V to 20 V
• Output Voltage: 5 V
• Output Current: 1.5 A
• Part # Aliases: IDTP9030-EVK
• For Use With: P9030-0NTGI

THEORY OF OPERATION
The IDTP9030 is a highly-integrated WPC
Power Consortium)-compliant wireless power charging IC
solution for the transmitter base station. It can deliver
more than 5W of power to the receiver when used with the
IDTP9020 or 5W in WPC “Qi” mode using near-field
magnetic induction as a means to transfer energy. It is the
industry’s first single-chip WPC-compliant solution
designed to drive a WPC-compliant Type-A1 transmitter
coil.
OVERVIEW
Figure 2 shows the block diagram of the IDTP9030.
When the VIN_UVLO block detects that the voltage at IN,
REG_IN, and BUCK5VT_IN (all connected together
externally) is above the Vin_rising threshold and
a logic LOW, the Enable Sequence circuitry activates the
voltage reference, the 5V and 2.5V LDOs, the 5V buck
switching regulator, and the Driver Control for the output
inverter.
The voltages at the outputs of the LDOs and the buck
regulator are monitored to ensure that they remain in
regulation, and the adapter voltage, coil current, and
internal temperature are monitored .
The Driver Control block converts a PWM signal from the
MCU to the gate drive signals required by the output
inverter to drive the external resonant tank.
Communication packets from the receiver in the mobile
device are recovered by the Demodulator and converted
to digital signals that can be read by the MCU.
Several internal voltages and the external thermistor
voltage (through GPIO2) are converted to their digital
representations by the ADC and supplied to the MCU.
Five GPIO ports are available to the system designer for
measuring an external temperature (ambient or inductor,
for example) and driving LEDs and a buzzer.
The clock for the MCU and other circuitry is generated by
either an external crystal or an internal RC oscillator.
I
external device or host.
Note 1 - Refer to the WPC specification at
http://www.wirelesspowerconsortium.com/
Revision 1.0
2
C SDA and SCL pins permit communication with an
for the most current information
1
(Wireless
EN
¯¯
15
is at
UNDER VOLTAGE LOCKOUT (UVLO)
The IDTP9030 has a built-in UVLO circuit that monitors
the input voltage and enables normal operation, as shown
in Figure 7.
OVER-CURRENT/VOLTAGE/TEMPERATURE
PROTECTION
The current in the inverter is monitored by an analog
Current Limit block. If the instantaneous coil current
exceeds 2A, the chip is shut down. VIN_OVP monitors the
voltage applied to the IDTP9030 by the external AC
adapter and shuts the part down if the adapter voltage
rises above 24V, to protect against excessive power
transfer to the receiver. The internal temperature is also
monitored, and the part is temporarily deactivated if the
temperature exceeds 140°C and reactivated when the
temperature falls below 110°C.
DRIVER CONTROL BLOCK and INVERTER
The Driver Control block contains the logic, shoot-through
protection, and gate drivers for the on-chip power FETs.
The FETs are configured as a very large inverter that
switches the SW pin between the voltage at IN and
ground at a rate set by the MCU.
Figure 7. V
0V
0V
V
IN
=10V
IN
versus UVLO threshold with /EN low.
UVLO exit event
© 2012 Integrated Device Technology, Inc.
Time (1s/div)
IDTP9030
Product Datasheet