UM1360Y datasheet(4/14 Pages) UNIONSEMI

Part #	UM1360Y

Description	Hysteretic Buck High Brightness LED Driver with Internal Switch

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Manufacturer	UNIONSEMI [Union Semiconductor, Inc.]

Direct Link	http://www.union-ic.com

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4 / 14 page

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http://www.union-ic.com Rev.01 Apr.2014

4/14

UM1360

Electrical Characteristics

(VIN= 16V, TA = 25°C, unless otherwise noted)

Symbol

Parameter

Test Conditions

Min

Typ

Max

Unit

VIN

Input Voltage Range

6

35

V

ILED

Output Current

RS=0.33Ω

303

mA

RS=0.1Ω

1000

IQ

Quiescent Current

without switching

VSET pin floating,

VIN= 16V

430

μA

ISD

Shutdown Current

VSET=GND, VIN=16V

35

70

μA

VSENSE

Mean current sense

threshold voltage

Measured on ISENSE pin

with respect to VIN

95

100

105

mV

VSENSE_HYS

Sense threshold

hysteresis

±15

%

ISENSE

ISENSE pin input

current

VSENSE=VIN-0.1

8

μA

VEN

VSET range on VSET

For DC dimming

0.3

2.5

V

VENON

DC voltage on VSET

pin to enable

VEN rising

0.25

V

VENOFF

DC voltage on VSET

pin to disable

VEN falling

0.2

V

RLX

LX switch on

resistance

ILX=1000mA

0.4

Ω

ILX(leak)

LX switch leakage

current

5

μA

TSS

Soft start time

VIN=16V, CEN=1nF

860

μs

FLX

Operating frequency

VIN= 16V, L=47μH,

VOUT=9.6V(3 LEDs),

RS=0.1Ω

200

kHz

FLXmax

Recommended

maximum switch

frequency

1.0

MHz

Ton_rec

(Note 2)

Recommended

minimum

switch ON time

For 4% accuracy

500

ns

Max duty cycle

100

%

DLX

Recommended duty

cycle range

25

75

%

TPD

(Note 2)

Internal comparator

propagation delay

45

ns

TOTP

Over temperature

protection

150

°C

TOTP_HYS

Temperature

protection hysteresis

40

°C

IXLmax

Current limit

VIN=32V(6 LEDs)

1.2

A

Note 2: Parameters are not tested at production, but guaranteed by design.

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