Renesas RTKA212832DR0000BU Manual
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Renesas RTKA212832DR0000BU Manual

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RTKA212832DR0000BU
The RTKA212832DR0000BU provides a simple
platform to demonstrate the performances of the
RAA212832. The RAA212832 is an integrated 72V
input voltage, 0.5A output load one synchronous buck
regulator with a fixed switching frequency from
350kHz, and two 100mA and 50mA output load linear
regulators LDOs. The buck can support a wide input
voltage range of 14V to 72V, and a fixed output
voltage of 12V. The LDO_3V3 can support a wide
input voltage range of 6V to 12V, and the output
voltage is fixed at 3.3V. The LDO_5 can support a
wide input voltage range of 6V to 12V, and the output
voltage is fixed at 5V. It is designed for small size and
high integration electric-bike control board power
management. Integrated buck and LDOs minimize
the system components.
The buck converter adopts peak current mode
control, providing 500mA current for load and
downstream LDO regulators, while the following
LDOs provide 5V and 3.3V regulated power source to
system. The current-mode buck converter provides
fast transient response and cycle-by-cycle switching
current limit. All output voltages are fixed internally
with few external components.
The RAA212832 has fixed frequency operation, even
the output terminal is light load condition; therefore,
the switching frequency is fixed during the load
variation. The RAA212832 also has a pin STBY to
enable or disable the standby function to control the
buck output voltage as 6V or 12V. When the STBY pin
is high and enabled, the standby function to control
buck output voltage is changed from 12V down to 6V
to save more energy with LDOs operations only.
R16UZ0021EU0100 Rev.1.00
Sep 20, 2021
Demonstration Board Manual
Features
▪ Buck Converter:
• 4.5V to 72V input voltage
• Fixed output voltage 12V
• 500mA output load capability
• 0.6Ω high-side MOSEFT r
• Fixed switching frequency 350kHz operation
• 6V standby function by STBY pin setting
• High-side OCP, UVP, UVLO, OTP fault
protection
▪ 5V LDO Regulator:
• 6V to 12V input voltage
• Fixed output voltage 5V
• 100mA output load capability
• Current limit foldback function
▪ 3.3V LDO Regulator:
• 6V to 12V input voltage
• Fixed output voltage 3.3V
• 50mA output load capability
• Current limit foldback function
Specifications
This board is configured and optimized for the
following operating conditions:
▪ V
= 14V to 72V (For VOUT is operated at 6V~12V)
IN
▪ V
= 12V (STBY pin is low) and 6V (STBY pin is
OUT
high)
▪ IOUT_MAX = 0.5A
▪ VLDO_5V = 5V
▪ LDO_5V_MAX = 0.1A
▪ VLDO_3V3 = 3.3V
▪ ILDO_3V3_MAX = 0.05A
DS(ON)
Page 1
© 2021 Renesas Electronics

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Summary of Contents for Renesas RTKA212832DR0000BU

  • Page 1 Demonstration Board Manual RTKA212832DR0000BU Features The RTKA212832DR0000BU provides a simple platform to demonstrate the performances of the ▪ Buck Converter: RAA212832. The RAA212832 is an integrated 72V • 4.5V to 72V input voltage input voltage, 0.5A output load one synchronous buck •...
  • Page 2 RTKA212832DR0000BU Demonstration Board Manual Figure 1. Typical Application Diagrams R16UZ0021EU0100 Rev.1.00 Page 2 Sep 20, 2021...

  • Page 3: Table Of Contents

    RTKA212832DR0000BU Demonstration Board Manual Contents Functional Description ..............4 Operation Range .

  • Page 4: Functional Description

    Operation Range The RTKA212832DR0000BU demonstration board input voltage range is 14V to 72V. The output voltage is fixed at 12V when the STBY pin is low and 6V when STBY pin is high. Therefore, the RAA212832 does not need an external feedback resistor design, it is a simple setting for use.

  • Page 5: Board Design

    RTKA212832DR0000BU Demonstration Board Manual Board Design Figure 3. RTKA212832DR0000BU Demonstration Board (Top) Figure 4. RTKA212832DR0000BU Demonstration Board (Bottom) Layout Guidelines A good PCB layout is important to achieve expected performance. Consideration should be taken when placing the components and routing the trace to minimize the ground impedance and keep the parasitic inductance low.

  • Page 6: Schematic Diagram

    Schematic Diagram LDO_VIN UNNAMED_3_POWERIND_I127_AA 120UH UNNAMED_3_RAA212832_I160_7 UNNAMED_3_SMCAP_I130_B VOUT 0.1UF UNNAMED_3_RAA212832_I160_3 STBY LDO_VIN LDO_5V LDO_3V3 LDO_5V RAA212832 LDO_3V3 STBY Figure 5. RTKA212832DR0000BU Board Circuit Schematic...

  • Page 7: Bill Of Materials

    RTKA212832DR0000BU Demonstration Board Manual Bill of Materials Ref Des Description Manufacturer Part Number IC SWITCHING REGULATOR,8P, PSOP-8E, ROHS Renesas RAA212832GSP#AA0 COIL PWR INDUCTOR, SM, 8mm, 120µH, 20%, 1.15A, Wurth 74404084121 ROHS 1A 80V SCHOTTKY BARRIER RECTIFIER Diodes B180-13-F C1, C2 CAP, SMD,1206, 10µF, 35V, 10%, X7R, ROHS...

  • Page 8: Typical Performance Graphs

    RTKA212832DR0000BU Demonstration Board Manual Figure 7. Bottom Layer Typical Performance Graphs = 56V, V = 6V, T = +25°C, unless otherwise noted. 6.03 VIN = 16V VIN = 24V VIN = 36V VIN = 48V 6.02 VIN = 56V VIN = 64V VIN = 72V 6.01...
  • Page 9 RTKA212832DR0000BU Demonstration Board Manual = 56V, V = 6V, T = +25°C, unless otherwise noted. 10V/Div 10V/Div 10mV/Div 5mV/Div 100mA/Div 100mA/Div 100mA/Div 100mA/Div 2µs/Div 1ms/Div Figure 10. Buck Output Ripple at Full Load Figure 11. Buck Output Ripple at No Load...
  • Page 10 RTKA212832DR0000BU Demonstration Board Manual = 56V, V = 12V, T = +25°C, unless otherwise noted. 12.04 VIN = 16V VIN = 24V 12.03 VIN = 36V VIN = 48V VIN = 56V VIN = 64V 12.02 VIN = 72V 12.01 12.00...
  • Page 11 RTKA212832DR0000BU Demonstration Board Manual = 56V, V = 12V, T = +25°C, unless otherwise noted. 10V/Div 10V/Div 50mV/Div OUT(AC) 500mV/Div 100mA/Div 500mA/Div 100mA/Div 200µs/Div 10ms/Div Figure 22. Load Transient between 0.25A to 0.5A Figure 23. UVP Fault with Hiccup = VINLDO = 6V, VLDO5V = 5V, VLDO3V3 = 3.3V, T = +25°C, unless otherwise noted.
  • Page 12 RTKA212832DR0000BU Demonstration Board Manual = VINLDO = 6V, VLDO5V = 5V, VLDO3V3 = 3.3V, T = +25°C, unless otherwise noted. (Cont.) 1V/Div 1V/Div LDOIN LDOIN 1V/Div LDO3V3 1V/Div LDO5V 20mA/Div LDO3V3 20mA/Div LDO5V 2µs/Div 2µs/Div Figure 28. VLDO3V3 OCP Fault with Current Foldback Figure 29.

  • Page 13: Ordering Information

    RTKA212832DR0000BU Demonstration Board Manual Ordering Information Part Number Description RTKA212832DR0000BU RAA212832 Demonstration Board Revision History Revision Date Description 1.00 Sep 20, 2021 Initial release R16UZ0021EU0100 Rev.1.00 Page 13 Sep 20, 2021...
  • Page 14 Renesas' products are provided only subject to Renesas' Terms and Conditions of Sale or other applicable terms agreed to in writing. No use of any Renesas resources expands or otherwise alters any applicable warranties or warranty disclaimers for these products.
  • Page 15 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Renesas Electronics RTKA212832DR0000BU...

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