ZXLD1374(2010) Просмотр технического описания (PDF) - Diodes Incorporated.

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производитель

ZXLD1374
(Rev.:2010)

60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST LED DRIVER CONVERTER

Diodes Incorporated. 

A Product Line of

Diodes Incorporated

ZXLD1374

Electrical Characteristics (Test conditions: VIN = VAUX = 12V, TA = 25°C, unless otherwise specified.)

Symbol

Parameter

Conditions

Min

Supply and reference parameters

VUV-

Under-Voltage detection threshold

Normal operation to switch disabled

VIN or VAUX falling

5.2

VUV+

Under-Voltage detection threshold

Switch disabled to normal operation

VIN or VAUX rising

5.5

IQ-IN

IQ-AUX

Quiescent current into VIN

Quiescent current into VAUX

PWM pin floating.

Output not switching

ISB-IN Standby current into VIN.

ISB-AUX Standby current into VAUX.

PWM pin grounded

for more than 15ms

VREF Internal reference voltage

No load

1.237

Change in reference voltage with output Sourcing 1mA

-5

ΔVREF current

Sinking 25µA

VREF_LINE Reference voltage line regulation

VIN = VAUX , 6.5V<VIN = <60V

-60

VREF-TC Reference temperature coefficient

DC-DC converter parameters

VADJ

External dc control voltage applied to ADJ DC brightness control mode

pin to adjust output current (Note 5)

10% to 200%

0.125

IADJ ADJ input current (Note 5)

VADJ ≤ 2.5V

VADJ = 5.0V

VGI

GI Voltage threshold for Boost and Buck-

boost modes selection (Note 5)

VADJ = 1.25V

IGI GI input current (Note 5)

VGI ≤ 2.5V

VGI = 5.0V

IPWM PWM input current

VPWM = 5.5V

tPWMoff

PWM pulse width

(to enter shutdown state)

PWM input low

10

TSDH

Thermal shutdown upper threshold

(LX output inhibited)

Temperature rising.

TSDL

Thermal shutdown lower threshold

(LX output re-enabled)

Temperature falling.

High-Side Current Monitor (Pin ISM)

IISM Input Current

Measured into ISM pin and VISM = VIN

VSENSE_acc

Accuracy of nominal VSENSE threshold

voltage

VADJ = 1.25V

VSENSE-OC Over-current sense threshold voltage

300

Typ Max Units

5.6 6.3

V

6 6.5

V

1.5 3 mA

150 300 µA

90 150 µA

0.7 10 µA

1.25 1.263 V

-90

+/-50

mV

5

dB

ppm/°C

1.25 2.5 V

100 nA

5

µA

0.8 V

100 nA

5

µA

36 100 µA

15 25 ms

150

ºC

125

ºC

11 20 µA

±0.25 ±2 %

350 375 mV

Notes:

5. The ADJ and GI pins have an internal clamp that limits the internal node to less than 3V. This limits the switch current should

those pins get overdriven.

ZXLD1374

Document number: DS35032 Rev. 1 - 2

Page 4 of 35

www.diodes.com

October 2010

© Diodes Incorporated

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