LM5035AMH-1 datasheet(8/30 Pages) NSC

Part #	LM5035AMH-1

Description	PWM Controller with Integrated Half-Bridge and SyncFET PWM Controller with Integrated Half-Bridge and SyncFET

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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8 / 30 page

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Soft-Start (SS Pin)

I

SS

Charging current in normal

operation

V

SS = 0

80

110

140

µA

Charging current during a hiccup

mode restart

V

SS = 0

0.6

1.2

1.8

µA

Soft-stop Current Sink

V

SS = 2.5V

80

110

140

µA

Oscillator (RT Pin)

F

SW1

Frequency 1 (at HO, half oscillator

frequency)

R

RT = 15 kΩ, TJ = 25°C

185

200

215

kHz

R

RT = 15 kΩ, TJ = -40°C to 125°C

180

220

F

SW2

Frequency 2 (at HO, half oscillator

frequency)

R

RT = 5.49 kΩ

430

500

570

kHz

DC level

2

V

Input Sync threshold

2.5

3

3.4

V

PWM Controller (Comp Pin)

Delay to output

80

ns

V

PWM-OS

SS to RAMP offset

0.7

1

1.2

V

Minimum duty cycle

SS = 0V

0

%

Small signal impedance

I

COMP = 600µA, COMP current to PWM

voltage

5000

Ω

Main Output Drivers (HO and LO Pins)

Output high voltage

I

OUT = 50mA, VHB - VHO, VVCC - VLO

0.5

0.25

V

Output low voltage

I

OUT = 100 mA

0.2

0.5

V

Rise time

C

LOAD = 1 nF

15

ns

Fall time

C

LOAD = 1 nF

13

ns

Deadtime, HO to LO, LO to HO

V

DLY = VREF, ICOMP = 0mA

45

70

100

ns

Peak source current

V

HO,LO = 0V, VVCC = 10V

1.25

A

Peak sink current

V

HO,LO = 10V, VVCC = 10V

2

A

HB Threshold

V

CC rising

3.8

V

Voltage Feed-Forward (RAMP Pin)

RAMP comparator threshold

COMP current = 0

2.4

2.5

2.6

V

Synchronous Rectifier Drivers (SR1, SR2)

Output high voltage

I

OUT = 10mA, VVCC - VSR1, VVCC - VSR2

0.25

0.1

V

Output low voltage

I

OUT = 20 mA (sink)

0.08

0.2

V

Rise time

C

LOAD = 1 nF

40

ns

Fall time

C

LOAD = 1 nF

20

ns

Peak source current

V

SR = 0, VVCC = 10V

0.5

A

Peak sink current

V

SR = VVCC, VVCC = 10V

0.5

A

T1

Deadtime, SR1 falling to HO rising,

SR2 falling to LO rising

R

DLY = 10k

33

ns

R

DLY = 27.4k

68

86

120

ns

R

DLY = 100k

300

ns

T2

Deadtime, HO falling to SR1 rising,

LO falling to SR2 rising

R

DLY = 10k

18

ns

R

DLY = 27.4k

20

29

42

ns

R

DLY = 100k

80

ns

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LM5035AMH-1 Datasheet(PDF) 8 Page - National Semiconductor (TI)

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