TLC5904

LED DRIVER

SLLS391 – NOVEMBER 1999

7

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

Terminal Functions (Continued)

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

TSENA

80

I

TSD(thermal shutdown) enable. When TSENA is high, TSD is enabled. When TSENA is

low, TSD is disabled.

TEST1

TEST2

58

75

I

TEST. Factory test terminal. TEST1 and TEST2 should be connected to GND for normal

operation.

THERMAL PAD

package bottom

Heat sink pad. This pad is connected to the lowest potential IC or thermal layer.

VCCANA

45

Analog power supply voltage

VCCLOG

81

Logic power supply voltage

VCCLED

41

LED driver power supply voltage

WDTRG

62

I

WDT (watchdog timer) trigger input. By applying a scan signal to this terminal, the scan

signal can be monitored by turning the constant current output off to protect the LED from

damage if the scan signal stops during the constant period designed.

WDCAP

42

I

WDT (watchdog timer) detection time adjustment. WDT detection time is adjusted by

connecting a capacitor between WDCAP and GND. When WDCAP is directly connected

to GND, WDT function is disabled. In this case, WDTRG should be tied to a high or a low

level.

XDOWN1

60

O

Shutdown. XDOWN1 is configured as open collector. It goes low when constant current

output is shut down by WDT or TSD function.

XDOWN2

59

O

OVM comparator output. XDOWN2 is configured as an open collector. It monitors terminal

voltage when constant current output is turned on. XDOWN2 goes low when this voltage

is lower than the level selected by OVM latch. When BLANK is set high, the previous level

is held.

XENABLE

64

I

DCLK enable. When XENABLE is low, data transfer is enabled. Data transfer starts on the

rising edge of DCLK after XENABLE goes low. During XENABLE high, no data is

transferred.

XLATCH

61

I

Latch. When XLATCH is high, data on the shift register goes through latch. When XLATCH

is low, data is latched. Accordingly, if data on the shift register is changed during XLATCH

high, this new value is latched (level latch).

XOE

63

I

Data output enable. When XOE is low, DOUT0–7 terminals are drived. When XOE is high,

DOUT0–7 terminals go to a high

-impedance state.

absolute maximum ratings (see Note 1)†

Logic supply voltage, VCC(LOG)

– 0.3 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supply voltage for constant current circuit, VCC(LED)

– 0.3 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Analog supply voltage, VCCANA

– 0.3 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output current (dc), IO(LC)

90 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range

– 0.3 V to VCCLOG + 0.3 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output voltage range, VO(DOUTn), VO(BOUT) and VO(GSOUT)

– 0.3 V to VCCLOG + 0.3 V

. . . . . . . . . . . . . .

Output voltage range, VO(OUTn) and VO(DOWNn)

– 0.3 V to 18 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, Tstg

–55

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous total power dissipation at (or below) TA = 25°C

4.7 W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power dissipation rating at (or above) TA = 25°C

38.2m W/

°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† 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.

NOTE 1: All voltage values are with respect to the GNDLOG terminal.