DRV590_16 Datasheet, PDF (4/18 Pages) Texas Instruments – 1.2-A HIGH-EFFICIENCY PWM POWER DRIVER

DRV590
SLOS365A – AUGUST 2001 – REVISED AUGUST 2002
operating characteristics, T_A = 25°C, R_L = 2 Ω, gain = 6 dB (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _IO
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _PSRR
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _ZI
Maximum output current
Power supply rejection ratio
Input impedance
Duty cycle = 82%
1.22
f = 1 kHz,
C(AREF) = 1 µF
70
>15
UNIT
A
dB
kΩ
PVDD = 5 V
1.2
3.8
VICR
Common-mode input voltage range
PVDD = 3.3 V
V
1.2
2.1
rds(on) Output on-resistance
PVDD = 5 V
PVDD = 3.3 V
0.5
Ω
0.65
η
Efficiency
PVDD = 5 V
PVDD = 3.3 V
64%
60%
Vn
Integrated noise floor
f = 10 Hz to 5 kHz, Gain = 6 dB
23
µV rms
functional block diagram
VDD
AGND
VDD
PVDD
IN–
Gain
Adjust
_
+
Deglitch
Gate
_
Logic
Drive
OUT–
+
_
_+
+
+
PGND
PVDD
IN+
Gain
Adjust
_
_
Deglitch
Gate
+
Logic
Drive
OUT+
PGND
SHUTDOWN
GAIN1
GAIN0
COSC
ROSC
AREF
SD
2
Gain
Biases
and
References
Ramp
Generator
Start-Up
Protection
Logic
OC
Detect
Thermal VDD ok
4
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