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TF6002 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - 26V Synchronous Rectified Step-Down Converter - TELEFUNKEN

भाग संख्या TF6002
समारोह 26V Synchronous Rectified Step-Down Converter
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TF6002 pdf
Functional Block Diagram
TF6002/ TF6002A
2A, 26V Synchronous Rectified Step-Down Converter
IN
+
1.1V -
OVP
RAMP
Current Sense
Amplifier
FB + 100 / 340 kHz
0.3V -
Oscillator
SQ
CLK
SS
-
0.923V ++
EA
-
+
Current
R
Q
Comparator
6A
5V
M1
0.13
M2
0.13
BS
SW
COMP
EN
6.2V
2.5V + EN OK
- Lockout
S
Comparator
+
1.5V - Shutdown
Comparator
1.2V
TSD
OVP
EN
IN < 4V
IN
Internal
Regulators
5V
Pin Descriptions
GND
PIN NAME
BS
IN
SW
GND
FB
COMP
EN
SS
PIN NUMBER PIN DESCRIPTION
High-side gate drive boost input pin. The BS pin supplies the drive for the high-side
1 N-Channel MOSFET switch. Connect a 0.01 mF or greater capacitor from SW to BS to
power up the high-side switch.
Power input pin. The IN pin supplies the power to the IC and the step-down converter
2 switches. Drive the IN pin with a 4.5V to 26V power source. Bypass the IN pin to GND pin
with an appropriate large capacitor to minimize noise on the input to the device.
Power switching output pin. The SW pin is the switching node that supplies power to
3 the output. Connect a LC filter from SW pin to the output load. Note that a capacitor is
needed from SW pin to BS pin to power the high-side switch.
4 Ground pin.
Feedback input pin. The FB pin senses the output voltage to regulate that voltage.
5 Drive the FB pin with a resistive voltage divider from the output voltage. The feedback
threshold is 0.923V.
Compensation input pin. The COMP pin is used to compensate the regulation control
6 loop. Connect a series RC filter from COMP to GND pin to compensate the regulation
loop. In some cases, additional capacitor is needed.
Enable input pin. The EN pin is a digital input pin that enables or disables the regulator.
7 Set the EN pin to high to turn the regulator on; set it to low, to turn the regulator off. Use
100 kW pull-up resistor for automatic start-up.
Soft-start control input pin. The SS pin controls the soft-start period. Connect a capacitor
8 from the SS pin to the GND pin to set the soft-start period. A 0.1 mF capacitor sets the
soft-start period to 15 ms. To disable the soft-start feature, leave the SS pin unconnected.
December 2011
2

विन्यास 12 पेज
डाउनलोड[ TF6002 Datasheet.PDF ]


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