Datasheet

DRV8302
SLES267 –AUGUST 2011 www.ti.com
CURRENT SHUNT AMPLIFIER CHARACTERISTICS
T
C
= 25°C unless otherwise specified
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
G1 Gain option 1 (GAIN = 0V) 9.5 10 10.5 V/V
G2 Gain Option 2 (GAIN = 2V) 38 40 42 V/V
Tsettling Settling time to 1% Tc = 0-60°C, G = 10, Vstep = 2 V 300 ns
Tsettling Settling time to 1% Tc = 0-60°C, G = 40, Vstep = 2 V 1.2 µs
Vswing Output swing linear range 0.3 5.7 V
Slew Rate G = 10 10 V/µs
DC_offset Offset error RTI G = 10 with input shorted 4 mV
Drift_offset Offset drift RTI 10 µV/C
Ibias Input bias current 100 µA
Vin_com Common input mode range –0.15 0.15 V
Vin_dif Differential input range –0.3 0.3 V
Vo_bias Output bias With zero input current, Vref up to 6 V –0.5% 0.5×Vref 0.5% V
Overall CMRR with gain resistor
CMRR_OV CMRR at DC, gain = 10 70 85 dB
mismatch
BUCK CONVERTER CHARACTERISTICS
T
C
= 25°C unless otherwise specified
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
UVLO
Internal undervoltage lockout threshold No voltage hysteresis, rising and falling 2.5 V
I
SD(PVDD2)
Shutdown supply current EN = 0 V, 25°C, 3.5 V ≤ VIN ≤ 60 V 1.3 4 µA
I
NON_SW(PVDD2)
Operating: nonswitching supply current VSENSE = 0.83 V, VIN = 12 V 116 136 µA
No voltage hysteresis, rising and falling,
V
EN_BUCK
Enable threshold voltage 0.9 1.25 1.55 V
25°C
R
DS_ON
On-resistance VIN = 12 V, BOOT-PH = 6 V 200 410 mΩ
I
LIM
Current limit threshold VIN = 12 V, T
J
= 25°C 1.8 2.7 A
OTSD_BK Thermal shutdown 150 °C
F
sw
Switching frequency RT = 200 kΩ 450 581 720 kHz
VSENSE falling 92%
VSENSE rising 94%
PWRGD VSENSE threshold
VSENSE rising 109%
VSENSE falling 107%
Hysteresis VSENSE falling 2%
VSENSE = VREF, V(PWRGD) = 5.5 V,
Output high leakage 10 nA
25°C
On resistance I(PWRGD) = 3 mA, VSENSE < 0.79 V 50 Ω
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