STMicroelectronics L6384 User Manual

®

HIGH-VOLTAGE HALF BRIDGE DRIVER

HIGH VOLTAGE RAIL UP TO 600 V
dV/dt IMMUNITY +- 50 V/nsec IN FULL TEM-

PERATURE RANGE
DRIVER CURRENT CAPABILITY :

400 mA SOURCE,
650 mA SINK

SWITCHING TIMES 50/30 nsec RISE/FALL
WITH 1nF LOAD

CMOS/TTL SCHMITT TRIGGER INPUTS
WITH HYSTERESIS AND PULL DOWN

SHUT DOWN INPUT
DEAD TIME SETTING
UNDER VOLTAGE LOCK OUT
INTEGRATED BOOTSTRAP DIODE
CLAMPING ON Vcc
SO8/MINIDIP PACKAGES

DESCRIPTION

The L6384 is an high-voltage device, manufac­tured with the BCD"OFF-LINE " technology. I t has

L6384

SO8 Minidip

ORDERING NUMBERS:

L6384D L6384

an Half - Bridge Driver structure that enables to
drive N Channel Power MOS or IGBT. The Upper
(Floating) Section is enabled to work with voltage
Rail up to 600V. The Logic Inputs are CMOS/TTL
compatible for ease of interfacing with controlling
devices. Matched delays between Lower and Up­per Section simplify high frequency operation.
Dead time setting can be readily accomplished by
means of an external resistor.

BLOCK DIAGRAM

V

CC

1

IN

V

CC

Idt

DT/SD

3

Vthi

2

DETECTION

BOOTSTRAP DRIVER

UV

DEAD

TIME

LOGIC

RS

LEVEL

SHIFTER

LVG

DRIVER

V

CC

HVG

DRIVER

H.V.

V

8

BOOT

C

BOOT

HVG

7

OUT

6

LVG

5

GND

4

D97IN518A

LOAD

May 2000

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L6384

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

Vout Output Voltage -3 to Vboot -18 V

Vcc Supply Voltage (*) - 0.3 to 14.6 V

Is Supply Current (*) 25 mA

Vboot Floating Supply Voltage -1 to 618 V

Vhvg Upper Gate Output Voltage -1 to Vboot V

Vlvg Lower Gate Output Voltage -0.3 to Vcc +0.3 V

Vi Logic Input Voltage -0.3 to Vcc +0.3 V

Vsd Shut Down/Dead Time Voltage -0.3 to Vcc +0.3 V

dVout/dt Allowed Output Slew Rate 50 V/ns

Ptot Total Power Dissipation (Tj = 85 °C) 750 mW

Tj Junction Temperature 150 °C

Ts Storage Temperature -50 to 150 °C

(*) The device has an internal Clamping Zener between GND and the Vcc pin, It must not be supplied by a Low Impedence Voltage Source.

Note:

ESD immunity for pins 6, 7 and 8 is guaranteed up to 900 V (Human Body Model)

PIN CONNECTION

IN

V

CC

DT/SD

GND

1
2
3
4 LVG

D97IN519

V

8
7
6

BOOT

HVG
VOUT

5

THERMAL DATA

Symbol Parameter SO8 Minidip Unit

R

th j-amb

Thermal Resistance Junction to Ambient 150 100 °C/W

PIN DESCRIPTION

N. Name Type Function

1 IN I Logic Input: it is in phase with HVG and in opposition of phase with LGV. It is compatible

2 Vcc I Supply input voltage: there is an internal clamp [Typ. 15.6V]
3 DT/SD I High impedance pin with two functionalities. When pulled lower than Vdt [Typ. 0.5V] the

4 GND Ground

voltage. [Vil Max = 1.5V, Vih Min = 3.6V]

to V

CC

device is shut down. A voltage higher than Vdt sets the dead time between high side gate
driver and low side gate driver. The dead time value can be set forcing a certain voltage
level on the pin or connecting a resistor between pin 3 and ground.
Care must be taken to avoid below threshold spikes on pin 3 that can cause undesired
shut down of the IC. For this reason the connection of the components between pin 3 and
ground has to be as short as possible. This pin can not be left floating for the same reason.
The pin has not be pulled through a low impedance to V

current source that feeds Rdt. The operative range is: Vdt....270K ⋅ Idt, that allows a dt

range of 0.4 - 3.1µs.

, because of the drop on the

CC

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L6384

PIN DESCRIPTION

(continued)

N. Name Type Function

5 LVG O Low Side Driver Output: the output stage can deliver 400mA source and 650mA sink [Typ.

Values].
The circuit guarantees 0.3V max on the pin (@ I

= 10mA) with VCC > 3V and lower than

sink

the turn on threshold. This allows to omit the bleeder resistor connected between the gate
and the source of the external mosfet normally used to hold the pin low; the gate driver
ensures low impedance also in SD conditions.

6 Vout O Upper Driver Floating Reference: layout care has to be taken to avoid below ground

spikes on this pin.

7 HVG O High Side Driver Output: the output stage can deliver 400mA source and 650mA sink

[Typ. Values].
The circuit gurantees 0.3V max between this pin and Vout (@ I

= 10mA) with VCC > 3V

sink

and lower than the turn on threshold. This allows to omit the bleeder resistor connected
between the gate and the source of the external mosfet normally used to hold the pin low;
the gate driver ensures low impedance also in SD conditions.

8 Vboot Bootstrap Supply Voltage: it is the upper driver floating supply. The bootstrap capacitor

connected between this pin and pin 6 can be fed by an internal structure named "bootstrap
driver" (a patented structure). This structure can replace the external bootstrap diode.

RECOMMENDED OPERATIN G CONDITIONS

Symbol Pin Parameter Test Condition Min. Typ. Max. Unit

Vout 6 Output Voltage Note1 580 V

Vboot -

Vout

fsw Switching Frequency HVG,LVG load CL = 1 nF 400 kHz

Vcc 2 Supply Voltage Vclamp V

T

Note 1:

8 Floating Supply Voltage Note1 17 V

j

If the condition Vboot - Vout < 18V is guaranteed, Vout can range from -3 to 580V.

Junction Temperature -45 125 °C

ELECTRICAL CHARACTERISTICS
AC Operation (VCC = 14.4V; Tj = 25°C)

Symbol Pin Parameter Test Condition Min. Typ. Max. Unit

ton 1 vs

5,7

tonsd 3 vs

High/Low Side Driver
Turn-On Propagation Delay

Vout = 0V

= 47kΩ

R

dt

Shut Down Input Propagation Delay 220 280 ns

200+dt ns

5,7

toff 1 vs

High/Low Side Driver

5,7

Turn-Off Propagation Delay

Vout = 0V
R

= 47kΩ

dt

Vout = 0V
R

= 146kΩ

dt

Vout = 0V
R

= 270kΩ

dt

250 300 ns

200 250 ns

170 200 ns

tr 7,5 Rise Time CL = 1000pF 70 ns
tf 7,5 Fall Time CL = 1000pF 30 ns

DC Operation (VCC = 14.4V; Tj = 25°C)

Supply Voltage Section

Vclamp 2 Supply Voltage Clamping Is = 5mA 14.6 15.6 16.6 V

Vccth1 2 Vcc UV Turn On Threshold 11.5 12 12.5 V
Vccth2 2 Vcc UV Turn Off Threshold 9.5 10 10.5 V

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