SGS Thomson Microelectronics L9611C, L9610C Datasheet
PWMPOWER MOS CONTROLLER
.HIGH EFFICIENCY DUE TO PWM CONTROL
ANDPOWERMOSDRIVER
.LOADDUMP PROTECTION
.LOADPOWERLIMITATION
.EXTERNALPOWERMOSPROTECTION
.LIMITEDOUTPUTVOLTAGESLEWRATE
DESCRIPTION
The L9610C/11Cis a monolithic integrated circuit
workingin PWM mode as controller of an external
powerMOStransistorinHighSide Driver configuration.
Features of the device include controlled slope of
the leadingand trailing edgeof the gate drivingvoltage,linearcurrentlimitingwithprotectiontimer,settableswitchingfrequencyfo,TTLcompatibleenable
function,protectionstatus ouput pin. Thedevice is
mountedin SO16micropackage,and DIP16package.
L9610C
L9611C
SO16
ORDERING NUMBERS: L9610C
DIP16
L9611C
BLOCK DIAGRAM
November 1991
This is advanced informationon a new product now in development or undergoing evaluation. Details are subject to change withoutnotice.
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L9610C - L9611C
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
Max. Supply Voltage 26 V
S
Transient Peak Supply Voltage (R1 ≥ 100Ω):
Load Dump:
5ms ≤ t
≤ 10ms; τfFall Time Constant = 100ms; R
rise
SOURCE
≥ 0.5Ω
60
Field Decay:
5ms ≤ t
≤ 10ms; τrRise Time Constant = 33ms; R
fall
SOURCE
≥ 10Ω
–80
V
V
T
J/Tstg
Low Energy Spike: t
I
V
Max. Supply Current (t < 300 ms) 0.3 A
S
Input Voltage –0.3 < VIN<VS– 2.5 V
IN
rise
=1µs, t
Junction and Storage Temperature Range – 55 to 150 °C
= 2ms, R
fall
SOURCE
≥ 10Ω
±100
THERMAL DATA
Symbol Parameter SO16 DIP16 Value
R
th j-amb
Thermal Resistance Junction-alumina Max 50 90 °C/W
PI N CONNECTI O N (Top view)
V
2/12
L9610C - L9611C
PIN FUNCTIONS
Pin Name Functions
1 INT A Capacitor Connected Between this Pin and Out
Voltage Slew Rate.
2 IN Analog Input Controlling the PWM Ratio. The operating range of the input
.
R
3V
R
voltage is 0 to V
Output of an Internal Voltage Reference
4 EN TTL Compatible Input for Switching off the Output.
5 PWL If this Pin is Connected to GND and V
Frequency f
are Reduced : this Allows to Transfera Costant Power to the
o
> 13 V, the Duty Cycle and the
S
Load.
6 Osc Current Sink and Source StageConnection of a Triangle Oscillator with
Definite Voltage Swing.
7 IND Input of an Operational Amplifier for Short Current Sensing and Regulation.
8 NC Not Connected.
9V
S
Common Supply Voltage Input
10 GND Common Ground Connection
11 TIM A Capacitor Connected Between this Pin and GND Defines the Protection
Delay Time.
12 MON Open Collector Monitoring Output off the PowerMOS Protection.
13,15 P2, P1 Connection for the Charge Pump Capacitor.
14 BS The Capacitor Connected Between thisPin and theSource of the Power MOS
Allows to Bootstrap the Gate Driving Voltage.
16 Out G Output for Driving the Gate of the External PowerMOS.
Defines the GATE
G
3/12
L9610C - L9611C
ELECTRICAL CHARACTERISITCS (T
=–40°Cto85°C;6V<VS<16 V unless otherwise specified)
amb
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
S
I
q
V
SC
V
SH
V
SL
V
R
I
R
V
INL
K
F
K
S
Operating Supply Voltage 6 16 V
Quiescent Current 2.5 6 mA
Internal Supply Voltage Clamp IS= 200mA 28 32 36 V
Supply Voltage High Threshold 16 18.5 21 V
Supply Voltage Low Threshold 4 5 6 V
Reference Voltage 3.3 3.5 3.7 V
Reference Current ∆VR≤ 100mV 1 mA
Input Low Threshold 0.13 0.15 0.2 VIN/V
Oscillator Freq. Constant Note 1 800 2500 nF/s
Gate Voltage Slew Rate
Note 2 3 5 9 nFV/ms
Constant
Protection Time Delay Constant Note 3 0.12 0.44 ms/nF
Sense Input Volt. 80 100 120 mV
Gate Driving Volt. above V
VS= 16V 8 16 V
S
Gate Voltage in OFF Condition IG= 100 µA 1.2 V
Input Current – 5 – 1 µA
Low Enable Voltage 0.8 V
High Enable Voltage 2.0 V
V
V
V
V
K
T
V
Si
GON
GOFF
I
IN
ENL
ENH
IEN Enable Input Current 2 µA
SR Slew Rate Without C
V
MONsat
Saturation Voltage (pin 12) I
MON = 2.5 mA
S
0.5 V/µs
1.5 V
R
Notes : 1. fo=KF/CF.
2. dV
3. t
prot=KTCT
/dt= Ks/Cs.
G
.
FUNCTIONAL DE SCRI PTION
PULSEWIDTH COMPARATOR
A ground compatible comparator generates the
PWMsignal whichcontrols thegate of theexternal
powerMOS.
Theslopes of the leadingand trailing edges of the
gate driving signal are defined by the external capacitorC
accordingto :
S
dV
/dt= KS/C
G
S
Thisfeature allowsto optimize theswitching speed
for the powerand RFIperformancebest suitedfor
the application.
Thelowerlimit of theduty cycle is fixedat 15% of
the ratio between the input and the reference voltage(seefig.1).Inputvoltageslowerthanthisvalue
disable the internal oscillator signal and therefore
the gate driver.
GROUNDCOMPATIBLETRIANGLE
OSCILLATOR
The triangle oscillator provides the switching frequencyf
setbytheexternalcapacitorCFaccording
o
to :
f
o=KF/CF
If the pin PWL (power limitation) is connected to
ground and Vs is higher than the PWL threshold
voltage,the duty cycle and thef
frequencyare re-
o
duced:this allowstotransferacostantpowertothe
load (seefig.2).
TIMERAND PROTECTIONLATCH
When an overcurrent occurs, the device starts
chargingthe externalcapacitorC
; the protection
T
time is set accordingto :
.
t
prot=KT
C
T
4/12
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