STCMB1 datasheet(11/59 Pages) STMICROELECTRONICS

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DocID028958 Rev 4

11/59

STCMB1

Electrical data

Tj = -40 °C to +125 °C, VVCC = VVBOOT = 15 V(a), CF = 470 pF; RRFMIN = 22.5 k;

CHVG = CLVG = CGD_PFC = 1 nF, CTON = 470 pF unless otherwise specified.

a. Adjust VVCC above VVCCOn before setting at 15 V.

Table 4. Electrical characteristics

Symbol

Parameter

Test condition

Min.

Typ.

Max. Unit

IC supply voltage

VVCC

Operating range

After turn-on

VVCCOn

Turn-on threshold

(1)Voltage rising

15.5

16.5

17.5

VVCCOff

Turn-off threshold

(1)Voltage falling

9.5

Supply current

Quiescent current after turn-on

VFB = 1 V

1.5

2.2

VFB = 2.5 V

Idle during burst mode

Tj = 25 °C

-0.7

0.94

IC latched off

1.2

ICC

Operating supply current

at fsw = 75 kHz

VFB = 1 V, GD_PFC only

2.8

3.6

VFB = 2.5 V, all drivers

4.5

High voltage start-up generator

VHV

Breakdown voltage

IHV < 100 µA

800

VHVstart

Start voltage (rising)

(1)IVCC < 100 µA

VVCC_SO

VCC switchover threshold

1.5

IHV, ON

ON-state charge current

VHV > VHVstart, VVCC < VVCC_SO

0.5

1.6

VHV > VHVstart, VVCC > VVCC_SO

IC latched off or restart after

overload timeout

3.5

4.5

5.5

IHV, OFF

Off-state leakage current

VHV = 400 V

µA

TTOUT

Generator shutdown timeout

After VVCC exceeds VVCCOn

IC debug functions

VZCD_D

PFC disable threshold

At turn-on, voltage rising

2.4

VISEN_HB_D HB disable threshold

At turn-on, voltage rising

2.4

X-capacitor discharge function

VHVmin

Peak residual voltage

IHV, DIS > 4.2 mA

IHV, DIS

Discharge current

VHV > 45 V

4.2

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