IR3310 PROGRAMMABLE CURRENT SENSING HIGH SIDE SWITCH Product Summary
Features • • • • • • •
Load current feedback Programmable over current shutdown Active clamp E.S.D protection Input referenced to Vcc Over temperatue shutdown Reverse battery protection
Rds(on)
7mΩ max.
Vcc.op.
6 to 28V
Current ratio
10 to 100A
Ishutdown
Description
Active clamp
The IR 3310 is a Fully Protected 4 terminal high side switch. The input signal is referenced to Vcc. When the input voltage Vcc - Vin is higher than the specified Vih threshold, the output power MOSFET is turned-on. When Vcc - Vin is lower than the specified Vil threshold, the output MOSFET is turned-off. A sense current proportional to the current in the power Mosfet is sourced to the Ifb pin. Over-current shutdown occurs when Vifb - Vin > 4 V. The current shutdown threshold is adjusted by selecting the proper RIfb. Either over-current and over-temperature latches off the switch. The device is reset by pulling the input pin high. Other integrated protections ( ESD, reverse battery, active clamp ) make the IR 3310 very rugged and suitable for the automotive environment.
8800 35V
Load Dump Max. 43V Package
5 Lead TO220
Typical Connection
VCC
IN
IR 3310
Ifb
Battery
OUT
10 k
LOAD RIfb on off
System Ground Power Ground
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1
IR3310 Absolute Maximum Ratings Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are referenced to Vcc lead. (TAmbient = 25oC unless otherwise specified).
Maximum input voltage Maximum Ifb voltage Maximum output voltage Diode max. permanent current (Rth = 60 °C/W) (1) Diode max. permanent current (Rth = 5 °C/W) (1) Diode max. pulsed current (1) Electrostatic discharge ( human body model ) Electrostatic discharge ( machine model ) Power dissipation ( Rth = 60 °C/W ) Max. storage and junction temperature
-16 -0.3 -0.3
50 50 30
Units
— — — — — — -40
2.8 35 100 4 0.5 2 150
Min RIfb Ifb max
Minimum resistor on the Ifb pin Max. Ifb current
0.3 -20
— +20
kΩ mA
Units
V
A
kV W °C
Thermal Characteristics Symbol
Parameter
Typ.
Max.
Rth free air
Thermal resistance - free air
60
Rth junct. to case
Thermal resistance junction to case
0.7
— —
°C/W °C/W
Recommended Operating Conditions These values are given for a quick design. For operation outside these conditions, please consult the application notes.
Symbol
Parameter
Vcc Vcc
Vcc Iout Iout 85°C amb. RIfb Pulse min. Fmax
Continuous input voltage Continuous Ifb pin voltage Supply to power ground voltage Continuous output current ( Rth/amb < 5 °C/W, Tj = 125°C) Continuous output current ( Rth/amb < 60 °C/W, Tj = 125°C) Ifb resistor to program Isd and scale (2 & 3) Minimum turn-on pulse width Maximum operating frequency
Fmax Prot.
Maximum frequency with protections activated
-Vin -VIfb
Min.
Max.
Units
6 0.3 6
28 28 28
V
— — 0.5 1
35 6.5 3.5
— —
— 500 200
A kΩ ms Hz
1) Limited by junction temperature. Pulsed current is also limited by wiring 2) 5000 Ohm or leaving Ifb open will shutdown the part. No current will flow in the load.
Over-temp. shutdown threshold Protection reset time Over voltage shutdown (not latched) Fixed over current shutdown Adjustable over current shutdown 1K Minimum pulse width (no WAIT state) WAIT function timer
Rev.Rdson Rds(on) reverse bsattery protection
Min.
Typ.
Max. Units Test Conditions
4 — — 30 100 30 200 0.5
4.5
5.4
165 50 33 120 40 500 1.2
— 300 37 140 50 1200 3.5
mS V A A µs ms
4
6.2
10
mΩ
V °C
see Fig. 7 see Fig. 7 VIfb 100 A Tj > 165 °C
IN 4
reverse battery protection
Ifb
OUT WWW.IRF.COM
IR3310
Lead Assignments
1 - In 2 - Ifb 3 - Vcc (tab) 4 - NC 5 - Out 12345
5 Lead TO220
Vcc-Vin
Vcc-Vin Vcc-Vin max Vcc-Vin1 max Vcc-Vin (op) Vih Vil Vhys
Vcc-Vout Vcc-Vout max
Vcc
Vclamp1 Vclamp2
In IR3310
Iin Iin
max Iin1,2 Iin(on)
VIfb
Ifb
Out
Iout Iout max -Ids cont. -Ids pulsed Iout 85°C Isd Iq
Ifb
Figure 1 - Voltages and currents definitions
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Vcc 90%
Vcc-Vout
DV/dt(on)
5V 10 %
Td on Tr1
Tr2
Figure 2 - Switching time definitions (turn-on)
5
IR3310
Vcc
Vcc-Vin
Vin
90%
Ids
Vcc-Vout
DV/dt(off)
T clamp Vcc
Vds clamp
10 %
Td off Tf
Vout Vcc-Vclamp ( see Design tip to evaluate power dissipation )
Figure 3 - Switching time definitions (turn-off)
Vin
Figure 4 - Active clamp waveforms
clamp
Vcc-Vin 12V 0V
I Load T minpulse
40 us (typ.) Ifb
Iout
T minpulse Wait
0V
Precise measurement
Figure 6 - Minimum pulse & WAIT function
Figure 5 - Current sense precision: Accurate measurement only when the power Mosfet is fully ON
6
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IR3310
Vcc-Vin 12V 0V
Iout
t < T reset
t > T reset
t > T reset
t < T reset
OI shutdown Isd wait
wait
Tj OT shutdown Tjsd
Figure 7 - Protection Timing Diagrams
All curves are typical characteristics. Operation in hatched ares is not recommended. Tj=250C, RIfb=500 Ohm, Vcc=14V (unless otherwise specified).
Current path capability should be above those curves
10
100
1
Load characteristic should be underneath those curves 0.1
10 1E-05 0.0001
0.001
0.01
0.1
1
10
100
1000
Figure 16 - I out (A) vs Protection resp. Time (s)
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0.0001
0.001
0.01
0.1
1
10
100
1000
Figure 17 - Rth (oC/W) vs Time (s)
9
IR3310
Case Outline - TO220 (5 lead)
IRGB 01-3042 01
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105 Data and specifications subject to change without notice. 4/3/2003
