A5974DTR STMicroelectronics, A5974DTR Datasheet - Page 32

• Manufacturer Part Number: A5974DTR
• Description: IC BUCK ADJ 2.5A 8SOIC
• Manufacturer: STMicroelectronics
• Series: -r
• Type: Step-Down (Buck)r

Specifications of A5974DTR

• Internal Switch(s): -
• Synchronous Rectifier: -
• Number Of Outputs: -
• Voltage - Output: 1.235 V ~ 35 V
• Current - Output: 2.5A
• Frequency - Switching: 250kHz
• Voltage - Input: 4 V ~ 36 V
• Operating Temperature: -
• Mounting Type: *
• Package / Case: *
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-11424-2

Buck-boost converters
STCF04
The STCF04 is a dedicated and space-optimized high-efficiency solution for driving
a LED flash module in camera phones, PDAs and other handheld devices using
the SuperCap technology. It is based on a DC-DC buck-boost converter, which
ensures correct and efficient charging control and monitoring of the SuperCap
within the entire battery voltage range. The output current control ensures good
current regulation over the forward voltage spread characteristics of the flash LEDs
in torch and flash mode operation. The SuperCap charging current is programmed
to a defined value which avoids overload of the battery.
Key features
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Application example
32
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Selectable 200 mA/400 mA SuperCap charging current
LED over-temperature detection and protection with external NTC resistor
Active balancing of SuperCap voltage
Shorted LED failure detection and protection
Chip over-temperature detection and protection
V IN : 2.7 V to 5.5 V
Aux LED
PVBAT
READY
AUXLED
TORCH
FLASH
ATN
RESET
SDA
SCL
VBAT VLX1
ADD PGND AGND
VLX2 LSCON
STCF04
RX
NTC
R Light
NTC
Optional light sensor
PGND
LSIN
DRIVE
ISENS
VOUT
VMID
LED
T FOTO
V REF
+
+
(3 x 3 mm)
TFBGA25
module
LED