MC0805B224K250CT datasheet(8/30 Pages) IRF

tên linh kiện	MC0805B224K250CT

Giải thích chi tiết về linh kiện	Drives 1 x 70W HID lamp

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5.1 IRS2573D State and Timing Diagram

VCC < UVLO-

(VCC Fault or Power Down)

UVLO Mode

Full-Bridge Off (CT=0V)

Buck Off (ICOMP, PCOMP,

TOFF=0V)

IGN Timer Off (TIGN=0V)

CLK Off (TCLK=0V)

IQCC  150A

Fault and Good Counters Reset

Fault Latch Reset

GENERAL Mode

Full-Bridge Oscillating @ fBRIDGE

Buck Enabled

IGN 'LOW'

CLK and Fault Counters Enabled

VSENSE OVP Enabled

ISENSE Over-current Limitation Enabled

Constant Power Control Enabled

VCC > UVLO+

and

VSENSE > VOV

and

RST < VRST-

Power Turned On

FAULT Mode

Fault Latch Set

Full-Bridge Off (CT=0V)

Buck Off

IGN Timer Off (TIGN=0V)

CLK Off (TCLK=0V)

IQCC  350A

VCC = 15.6V

All Counters Reset

VCC < UVLO-

(Power Off)

or

RST > VRST+

(Fault Reset)

VSENSE < VOV(1/7.5) for 197sec

(short circuit or does not warm up)

or

VSENSE < VOV(1/7.5) for 16384 Events

IGN Mode

IGN (21s 'HIGH'/64s 'LOW')

Ignition Counter Enabled

Buck and Full-Bridge Enabled

CLK and Fault Counters Enabled

Good Counter Reset

VSENSE OVP Enabled

VSENSE < VOV(2/5)

VSENSE > VOV(2/5)

VSENSE > VOV(2/5) for 787sec

(open circuit)

Reset

Good

Counter

Good Counter = 2730sec

(No faults detected)

BUCK OFF Mode

Buck Off

Full-Bridge Oscillating

Fault Counters Enabled

Reset

Fault and Good

Counters

VSENSE < VOV(1/7.5)

VOV(2/5) < VSENSE < VOV

and

PCOMP > 0.2V

and

ICOMP > 0.5V

VSENSE > VOV

or

PCOMP < 0.2V

or

ICOMP < 0.2V

VSENSE < VOV(2/5)

and

PCOMP > 0.2V

and

ICOMP > 0.5V

Figure 5.2: IRS2573D state and timing diagram

5.2 Under-voltage Lockout (UVLO) Mode

The under-voltage lockout mode (UVLO) is defined as the state the IC is in when VCC is

below the turn-on threshold of the IC. The IC is designed to maintain an ultra-low supply

current during UVLO mode of 150uA, and to guarantee the IC is fully functional before

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