P9030-EVK IDT, P9030-EVK Datasheet - Page 16

• 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

IDTP9030
Product Datasheet
DEMODULATOR
Power is transferred from the transmitter to the receiver
through their respective coils: a loosely-coupled
transformer. How much power is transferred is
determined by the transmitter’s switching frequency
(110kHz-205kHz), and is controlled by the receiver
through instructions sent back through the coils to the
transmitter to change its frequency, end power transfer, or
do something else. The instructions take the form of data
packets, which are capacitively coupled into the
IDTP9030’s Demodulator through the HPF pin.
Recovering the data packets is the function of the
Demodulator. Understanding the packets is up to the
MCU.
OUTPUT VOLTAGE SENSE
The voltage at the junction of the external inductor and
capacitor that comprise the resonant tank is monitored by
the VOSNS block, digitized by the ADC, and fed to the
digital control logic. The control algorithm also requires
knowledge of the voltage across the inverter, so that
voltage is also processed by the ADC and sent to the
digital block.
MICRO-CONTROLLER UNIT (MCU)
The IDTP9030’s MCU processes the algorithm,
commands, and data that control the power transferred to
the reciever. The MCU is provided with RAM and ROM,
and parametric trim and operational modes are set at the
factory through the One-Time Programming (OTP) block,
read by the MCU at power-up. Communication with
external memory is performed through I
and SDA pins.
APPLICATIONS INFORMATION
The recommended applications schematic diagram is
shown in Figure 15. The IDTP9030 operates with a 19V
(±1V) input. The switching frequency varies from 110kHz
to 205kHz. At the 205kHz limit the duty cycle is also
variable. The power transfer is controlled via changes in
switching frequency. The base or TX-side has a series
resonance circuit made of a WPC Type-A1 coil (~24H)
and a series resonant capacitor (~100nF) circuit driven by
a half-bridge inverter, as shown in Figure 8.
Revision 1.0
2
C via the SCL
DC
16
Figure 8 shows the resonant tank configuration from the
WPC specification. IDT has found that the circuit of
Figure 9 is preferred for lower noise in the demodulation
channel.
EXTERNAL CHIP RESET and EN
The IDTP9030 can be externally reset by pulling the
RESET pin to a logic high above the V
The RESET pin is a dedicated high-impedance active-high
digital input, and the effect is similar to the power-up reset
function. Because of the internal low voltage monitoring
scheme, the use of the external RESET pin is not
mandatory. A manual external reset scheme can be
added by connecting 5V to the RESET pin through a
simple
microcontroller’s registers are set to the default
configuration. When the RESET pin is released to a LOW,
the microcontroller starts executing the code from the boot
address. If the application is in a noisy environment, an
external RC filter is recommended (see Figure 10 for
reference)
19V
Figure 8. Half Bridge inverter TX Coil Driver.
Figure 9. Half Bridge inverter TX Coil Driver.
19V
switch.
Driver
Fsw
Driver
Fsw
When
© 2012 Integrated Device Technology, Inc.
A1 Coil
RESET
24 H
¯¯
100 nF
24 H
IH
100 nF
level.
is
A1 Coil
HIGH,
the