DIODES AP3015 Micro Power Step Up DC Converter Instruction Manual
- June 1, 2024
- DIODES
Table of Contents
DIODES AP3015 Micro Power Step Up DC Converter
Product Information
Specifications
- Supply Voltage: 2.5 to 4.2V
- Output Current (Max.): Not specified
- Output Voltage: Vout+ Vout-
- Ripple & Noise (Max.): 150mV
- Efficiency (Typ.): Not specified
Product Usage Instructions
Description
The AP3015 is a step-up DC/DC converter designed for positive and negative
output LCD/OLED bias supply. It functions as a standard boost circuit with the
AP3015 serving as the driver and control device.
Powering the Demo Board
The demo board can be powered within a range of 2.5V to 4.2V, providing
regulated positive and negative outputs.
Adjusting Output Voltage
The positive output voltage can be controlled by adjusting the feedback
resistor. The output voltage can be calculated using the formula: 1.23 * (R2 +
R1) / R2, where the feedback reference is 1.23V.
Enabling/Disabling Output
To turn on or turn off the demo board output for flexible operation,
utilize the disable terminal.
FAQs
-
1. What is the purpose of the AP3015 step-up DC/DC converter?
The AP3015 is designed for positive and negative output LCD/OLED bias supply. -
2. What is the range of the supply voltage for the demo board?
The demo board can be powered from 2.5V to 4.2V.
Description
The AP3015 is a step-up DC/DC converter, which can be used for positive and
negative output LCD/OLED bias supply. In fact, it is a standard boost circuit,
where the AP3015 works as the driver and control device. The AP3015 features a
wide input voltage range. The operation voltage is ranged from 1.2V to 12V.
And the output voltage is up to 34V. A current limited, fixed off-time control
scheme conserves operating current, resulting in high efficiency over a broad
range of load current. The switch and all of the control circuit are
integrated in the AP3015, so fewer tiny external components are needed in the
PCB board, which are bypass capacitor (Cin), boost inductor (L), boost
schottky diode (D), output capacitor (Cout) and feedback resistor network
(R1,R2). The demo board can be powered from 2.5V to 4.2V. It provides
regulated positive output and negative output. The positive output voltage can
be controlled by the feedback resistor. The feedback reference is 1.23V, so
the output voltage can be calculated as 1.23*(R2+R1)/R2. To achieve at
flexible operation, a disable terminal is designed to turn on or turn off the
demo board output.
Specification
| Item | Value |
|---|---|
| Supply Voltage | 2.5 to 4.2V |
| **** Output Current (Max.) | ±6mA@Vin=2.5V |
±10mA@Vin=4.2V
Output Voltage| Vout+| 20V ± 5%
Vout-| -20V ± 10%
Ripple & Noise (Max.)| 150mV
Efficiency (Typ.)| 73%@ Vin=2.5V,Io = ±6mA
76％@Vin=4.2V,Io = ±10mA
Note: The cross regulation can be guaranteed by “Output Voltage”.
Schematics of the PCB
Note: Cout2 and Cout4 are backup.
PCB Layout
Photo View of the Demo Board
PCB Dimensions
BOM
| Item | Quantity | Location | Part | Footprint |
|---|---|---|---|---|
| 1 | 1 | U1 | AP3015 | SOT23-5 |
| 2 | 1 | L | 10uF, Sumida: CDRH5D28RNP-100NC | SMD |
| 3 | 1 | Cin | 4.7uF, X7R Ceramic | 1206 |
| 4 | 2 | Cout1, Cout 3 | 10uF, X7R Ceramic | 1206 |
| 5 | 2 | C1, C2 | 1uF, X7R Ceramic | 1206 |
| 6 | 1 | Cf | 10pF, X7R Ceramic | 0805 |
| 7 | 4 | D1, D2, D3, D4 | SS14, Schottky | SMD |
| 8 | 1 | R1 | 2M, 1% | 0805 |
| 9 | 1 | R2A | 470K, 1% | 0805 |
| 10 | 1 | R2B | 180K, 1% | 0805 |
| 11 | 1 | J1 | 5 Pin Connector | SIP-5 |
| 12 | 1 | J2 | 7 Pin Connector | SIP-7 |
| 13 | 2 | Cout2, Cout4 | NC |
Test Result
Output Voltage
| **** Vin = 2.5V | Iout+ = 0mA | Iout+ = 6mA |
|---|---|---|
| Vout+ (V) | Vout- (V) | Vout+ (V) |
| Iout- = 0mA | 20.194 | -20.285 |
| Iout- = 6mA | 20.028 | -18.873 |
| **** Vin = 4.2V | Iout+ = 0mA | Iout+ = 10mA |
| --- | --- | --- |
| Vout+ (V) | Vout- (V) | Vout+ (V) |
| Iout- = 0mA | 20.197 | -20.285 |
| Iout- = 10mA | 19.878 | -18.434 |
Ripple & Noise
Efficiency
Note: The Max. Output Capability is ±8mA @ Vin=2.5V and ±12mA @Vin=4.2V.
The recommended maximum Output Capability is ±6mA @ Vin=2.5V and ±10mA
@Vin=4.2V.
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