UCC2541

SLUS621A − AUGUST 2004 − SEPTEMBER 2005

2

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

DESCRIPTION (CONT.)

The UCC2541 is available in the extended temperature range of –40

°C to 105°C and is offered in thermally

enhanced PowerPAD

t 20-pin HTSSOP (PWP) or 32-pin quad flatpack (RHB) package. This space saving

package with standard 20-pin TSSOP footprint has a drastically lower thermal resistance of 1.4

accommodate the dual high-current drivers on board.

ABSOLUTE MAXIMUM RATINGS

UCC2541

UNIT

Supply voltage range, VDD

36

V

Supply current, IVDD

VDD

50

mA

CEA−, COMP, G2C, RAMP, SS, TR, VEA−

−0.3 to 3.6

VDRV

−0.3 to 9

Analog input voltages

G1, BST

SW−0.3 to SW+9

V

Analog input voltages

SW, SWS

−1 to 36

V

G2, G2S

−1 to 9

SYNCIN

−0.3 to 8.0

Sink current (peak), IOUT_SINK

G1, G2

3.5

A

Source current (peak), IOUT_SOURCE

G1, G2

−3.5

A

Operating junction temperature range, TJ

−55 to 150

Storage temperature, Tstg

−65 to 150

°C

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds

300

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.

(2) All voltages are with respect to GND. Currents are positive into, and negative out of the specified terminal.

RECOMMENDED OPERATING CONDITIONS

MIN

TYP

MAX

UNIT

Supply voltage, VDD

Mode 1

8.5

35

Supply voltage, VDRV

Mode 2

4.75

9.00

V

Supply voltage, REF

Mode 3

3.0

3.3

3.6

V

Supply voltage bypass, CVDD

1.0

2.2

Reference bypass capacitor, CREF

0.1

1.0

2.2

F

VDRV bypass capacitor, CVDRV

0.2

µF

BST−SW bypass capacitor, CBST−SW

0.1

Timer current resistor range, RRSET

10

50

k

Ω

PWM ramp capacitor range, CRAMP

100

680

pF

Turn-off capacitor range, CG2C

120

1000

pF

COMP pin load range, RLOAD

6.5

k

Ω

Junction operating temperature, TJ

−40

105

°C