STOD1812PUR STMicroelectronics, STOD1812PUR Datasheet - Page 8

• Manufacturer Part Number: STOD1812PUR
• Description: IC PWR SUPPLY PMOLED 10-DFN
• Manufacturer: STMicroelectronics

Specifications of STOD1812PUR

• Display Type: PMOLED
• Configuration: Display Matrix
• Current - Supply: 1.3mA
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 10-DFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -
• Digits Or Characters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-6839-2

Functional description
5
5.1
5.2
5.3
5.4
8/19
Functional description
Boost controller
STOD1812 is a boost converter operating in PFM (pulsed frequency modulation) mode. The
converter monitors the output voltage through the bridge resistor divider R
when the feedback voltage falls below the feedback voltage, the boost switch t
and the inductor current ramps up. The inductor current is measured by detecting the
temperature compensated drain voltage of the boost MOSFET. The boost turns off when its
drain voltage reaches the internal reference, the main switch remains off until the minimum
off time has passed and the feedback voltage is below the reference again. A maximum ON
time prevents the switch t
In order to calculate the values of the bridge resistors with a fixed V
can be used:
Enable
The ENABLE pin is a logic input signal that turns on the controller when the voltage on this
pin is equal to or higher than 1.2 V. When the voltage is at or below 0.4 V the STOD1812
goes into shutdown mode. In this case, the true-shutdown switch is turned off and the
overall power consumption is reduced to 0.1 µA. No pull-up or pull-down is present on this
pin.
Efficiency
The total consumption of some PMOLED displays can be as low as 1 mA. In order to
increase the battery life of the device, the STOD1812 offers high efficiency over a wide
range of output load current and input voltages. See typical application efficiency
performance in
Under voltage lockout (UVLO)
The minimum supply voltage is 2.5 V, under which the undervoltage lockout circuit operates
with a typical threshold of 2.3 V.
Section 8 on page
SW
from staying ON for an excessively long period.
11.
1,21
1,21
V
V
O
O
- 1 =
- 1 =
R
R
R
R
2
2
1
1
O
, the following formula
1
and R
SW
STOD1812
turns on
2
, and