AIC1340 Ver la hoja de datos (PDF) - Analog Intergrations

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AIC1340

High Performance, Tripple-Ouput, Auto-Tracking Combo Controller

Analog Intergrations 

AIC1340

n ELECTRICAL CHARACTERISTICS (Continued)

PARAMETER

TEST CONDITIONS

SYMBOL MIN. TYP. MAX. UNIT

PWM CONTROLLER ERROR AMPLIFIER

DC GAIN

76

dB

Gain Bandwidth Product

GBWP

11

MHz

Slew Rate

COMP1=10pF

PWM CONTROLLER GATE DRIVER

SR

6

V/µS

Upper Drive Source

Upper Drive Sink

Lower Drive Source

Lower Drive Sink

PROTECTION

VCC=12V, VUGATE=11V

VCC=12V, VUGATE =1V

VCC=12V, VLGATE=11V

VCC=12V, VLGATE=1V

RUGH

RUGL

RLGH

RLGL

5.2 6.5

Ω

3.3 5

Ω

4.1 6

Ω

3

5

Ω

OCSET Current Source

Soft-Start Current

VOCSET=4.5V DC

IOCSET

ISS

170 200 230 µA

11

µA

Chip Shutdown Soft Start

Threshold

1.0

V

n PIN DESCRIPTIONS

Pin 1:

PHASE: Over-current detection pin. Con-

nect the PHASE pin to source of

the external high-side N-

MOSFET. This pin detects the

voltage drop across the high-side

N-MOSFET RDS(ON) for over-

current protection.

Pin 2:

UGATE: External high-side N-MOSFET

gate drive pin. Connect UGATE

to gate of the external high-side

N-MOSFET.

Pin 3: SD:

To shut down the system, active

high or floating.

Pin 4: VCC: The chip power supply pin. It also

Pin 5: SS:

Pin 6: FB2:

provides the gate bias charge for

all the MOSFETs controlled by

the IC. Recommended supply

voltage is 12V.

Soft-start pin. Connect a capaci-

tor from this pin to ground. This

capacitor, along with an internal

10µA (typically) current source,

sets the soft-start interval of the

converter.

Pulling this pin low will shut down

the IC.

Connect this pin to a resistor di-

vider to set the linear regulator

output voltage.

5

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