ZXLD1374

60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST

LED DRIVER CONVERTER WITH AEC-Q100

ZXLD1374

Document number: DS35032 Rev. 2 - 2

6 of 37

www.diodes.com

March 2011

© Diodes Incorporated

A Product Line of

Diodes Incorporated

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Output Parameters

FLAG pin low level output voltage

Output sinking 1mA

0.5

V

1

µA

STATUS Flag no-load output voltage

(Note 9)

Normal operation

4.2

4.5

4.8

V

(Note 10)

3.3

3.6

3.9

3.3

3.6

3.9

3.3

3.6

3.9

2.4

2.7

3.0

1.5

1.8

2.1

Excess sense resistor current

0.6

0.9

1.2

0.6

0.9

1.2

Normal operation

10

k

Ω

Low side switch output (LX pins tied together)

Low side switch leakage current

(Note 11)

60

µA

0.5

0.8

Ω

Propagation delay high-low

86

ns

Propagation delay low-high

131

ns

LX output rise time

208

ns

LX output fall time

12

ns

Time to assert ‘STALL’ flag and

warning on STATUS output

(Note 12)

LX low or high

100

170

µs

Upper threshold voltage

Onset of output current reduction

560

625

690

mV

Lower threshold voltage

Output current reduced to <10% of

380

440

500

mV

TADJ pin Input current

1

µA

Notes:

9. In the event of more than one fault/warning condition occurring, the higher priority condition will take precedence. E.g. ‘Excessive coil current’

and ‘Out of regulation’ occurring together will produce an output of 0.9V on the STATUS pin. The voltage levels on the STATUS output assume

the minimum value of 6V.

11. With the device still in switching mode the LX pin has an over-voltage detection circuit connected to it with a resistance of approximately 1M

Ω.

switched to its nominal operating voltage, before operation is allowed to resume. Restart cycles will be repeated automatically until the operating