Harman Kardon AVR 1650, Service Manual

Page: 120 / 159

TPS65251
www.ti.com
SLVSAA4B –JUNE 2010–REVISED JANUARY 2011
TERMINAL FUNCTIONS (DCA) (continued)
NAME NO. I/O DESCRIPTION
VIN 32 I Input supply
VIN 33 I Input supply
VIN 34 I Input supply
GND 35 Ground pin
LX3 36, 37 O Switching node for Buck 3
VIN3 38 Input supply for Buck 3. Fit a 10-µF ceramic capacitor close to this pin.
BST3 39 I Bootstrap capacitor for Buck 3. Fit a 47-nF ceramic capacitor from this pin
to the switching node.
EN3 40 I Enable pin for Buck 3. A low level signal on this pin disables it. If pin is
left open a weak internal pull-up to V3V will allow for automatic enable.
For a delayed start-up add a small ceramic capacitor from this pin to
ground.
PAD Power pad. Connect to ground.
ABSOLUTE MAXIMUM RATINGS
(1)
over operating free-air temperature range (unless otherwise noted)
Voltage range at VIN1,VIN2, VIN3, LX1, LX2, LX3 –0.3 to 18 V
Voltage range at LX1, LX2, LX3 (maximum withstand voltage transient < 10 ns) –1 to 18 V
Voltage at BST1, BST2, BST3, referenced to Lx pin –0.3 to 7 V
Voltage at V7V, COMP1, COMP2, COMP3 –0.3 to 7 V
Voltage at V3V, RLIM1, RLIM2, RLIM3, EN1,EN2,EN3, SS1, SS2,SS3, FB1, FB2, FB3,
–0.3 to 3.6 V
PGOOD, SYNC, ROSC, LOW_P
Voltage at AGND, GND
–0.3 to 0.3 V
T
J
Operating virtual junction temperature range –40 to 125 °C
T
STG
Storage temperature range –55 to 150 °C
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute–maximum–rated conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
MIN NOM MAX UNIT
VIN Input operating voltage 4.5 18 V
T
J
Junction temperature –40 125 °C
ELECTROSTATIC DISCHARGE (ESD) PROTECTION
MIN MAX UNIT
Human body model (HBM) 2000 V
Charge device model (CDM) 500 V
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AVR 1650 harman/kardon
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