No. 7543-6/19

LB11690, 11690H

Pin Functions *: Items in parentheses refer to the LB11690H.

Pin name

Pin No.

Pin description

GND

1 (2)

Ground

RFGND

2 (3)

Ground sensing pin. Connect the ground side of the low-resistance resistor RF connected to the RF pin to this pin.

RF

3 (4)

Output current detection pin. Connect the low-resistance resistor RF between this pin and ground. The output current will be limited

WL

4 (5)

VL

7 (9)

Low side n-channel power FET gate drive output

UL

10 (12)

5 (7)

8 (10)

High side n-channel power FET source voltage detection

11 (13)

WH

6 (8)

VH

9 (11)

High side n-channel power FET gate drive output

UH

12 (14)

IN1

13 (16)

IN2

14 (17)

Hall sensor signal inputs. Insert capacitors between these pins and ground for stabilization.

IN3

15 (18)

RES

16 (20)

Reset input. Insert a resistor between this pin and the V5 pin, and a capacitor between this pin and ground.

EI+

17 (21)

Integrating amplifier noninverting input

EI–

18 (22)

Integrating amplifier inverting input

TOC

19 (23)

PWM waveform comparison (integrating amplifier output)

PWM

20 (24)

PWM oscillator frequency setting. Insert a capacitor between this pin and ground.

FV

21 (25)

Hall sensor signal one-shot multi-pulse output

RC

22 (26)

Hall sensor signal one-shot multi-pulse amplitude setting. Insert a resistor between this pin and the V5 pin, and a capacitor between

this pin and ground.

HP

23 (27)

Hall sensor signal three-phase synthesized output (open collector output)

CP2

24 (28)

Charge pump capacitor connections. Connect a capacitor between pins CP1 and CP2.

CP1

25 (29)

LVS

26 (30)

Undervoltage protection voltage detection. To detect a voltage of 5 V or over, connect a zener diode in series to set the detection

voltage.

V5

27 (32)

5 V power supply (control circuit power supply). Insert a capacitor between this pin and ground.

V12

28 (33)

12 V power supply (UL, VL, and WL output block power supply). Insert a capacitor between this pin and ground.

29 (35)

Power supply. Insert a capacitor between this pin and ground for power supply stabilization.

VB

30 (1)

Charge pump output (UH, VH, and WH output block power supply). Insert a capacitor between this pin and VCC.

(FRAME)

—

The FRAME pin is connected to the IC lower surface metal frame. Both should be left electrically open during operation.

(6) (15)

(NC)

(19) (31)

These pins are not connected to the IC internally in the package, and thus may be used for wiring connections.

(34) (36)