FN4496 Datasheet, PDF (5/14 Pages) Intersil Corporation – Advanced PWM and Dual Linear Power Control

HIP6017
Electrical Specifications Recommended Operating Conditions, Unless Otherwise Noted. Refer to Figures 1, 2 and 3 (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNITS
Slew Rate
SR
COMP = 10pF
-
6
-
V/µs
PWM CONTROLLER GATE DRIVER
Upper Drive Source
Upper Drive Sink
Lower Drive Source
Lower Drive Sink
PROTECTION
I_UGATE
R_UGATE
I_LGATE
R_LGATE
VCC = 12V, V_UGATE1 = 6V
V_{UGATE1-PHASE1} = 1V
VCC = 12V, V_LGATE1 = 1V
V_LGATE1 = 1V
-
1
-
A
-
1.7 3.5
Ω
-
1
-
A
-
1.4 3.0
Ω
V_OUT1 Over-Voltage Trip
FAULT Sourcing Current
OCSET1 Current Source
Soft-Start Current
Chip Shutdown Soft-Start Threshold
I_OVP
I_OCSET
I_SS
VSEN1 Rising
V_FAULT/RT = 10V
V_OCSET = 4.5V_DC
112 115 118
%
10 14
-
mA
170 200 230
µA
-
11
-
µA
-
-
1.0
V
POWER GOOD
V_OUT1 Upper Threshold
V_OUT1 Under-Voltage (Lower Threshold)
V_OUT1 Hysteresis (VSEN1/DACOUT)
PGOOD Voltage Low
VSEN1 Rising
VSEN1 Rising
Upper/Lower Threshold
V_PGOOD I_PGOOD = -4mA
108
-
110
%
92
-
94
%
-
2
-
%
-
-
0.5
V
Typical Performance Curves
1000
100
R_T PULLUP
TO +12V
10
R_T PULLDOWN TO V_SS
10
100
SWITCHING FREQUENCY (kHz)
FIGURE 4. R_T RESISTANCE vs FREQUENCY
1000
Functional Pin Descriptions
VSEN1 (Pin 22)
This pin is connected to the PWM converter’s output voltage.
The PGOOD and OVP comparator circuits use this signal to
report output voltage status and for over-voltage protection.
OCSET1 (Pin 23)
Connect a resistor (R_OCSET) from this pin to the drain of the
respective upper MOSFET. R_OCSET, an internal 200µA
current source (I_OCSET), and the upper MOSFET on-
100 _{CUGATE1 = CLGATE1 = CGATE}
V_VCC = 12V, V_IN = 5V
80
C_GATE = 4800pF
60
C_GATE = 3600pF
40
C_GATE = 1500pF
20
C_GATE = 660pF
0
100 200
300 400 500 600 700 800
SWITCHING FREQUENCY (kHz)
900 1000
FIGURE 5. BIAS SUPPLY CURRENT vs FREQUENCY
resistance (r_DS(ON)) set the converter over-current (OC) trip
point according to the following equation:
I_PEAK = ^I---^O----^C----^S---_r-^E-_D---^T-_S---^x-₍--^R-_O----^ON----₎^C----^S----^E----^T--
An over-current trip cycles the soft-start function. Sustaining
an over-current for 2 soft-start intervals shuts down the IC.
Additionally, OCSET1 is an output for the inverted FAULT
signal (FAULT). If a fault condition causes FAULT to go high,
OCSET1 will be simultaneously pulled to ground though an
internal MOS device (typical r_DS(ON) = 100Ω).
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