SUPPLY CURRENT |
VI |
Input voltage |
|
2.7 |
|
18 |
V |
IQ |
Operating quiescent current into VIN |
Device PWM switching no load |
|
|
1.8 |
mA |
ISD |
Shutdown current |
CRTL=GND, VIN = 4.2 V |
|
|
1 |
μA |
UVLO |
Undervoltage lockout threshold |
VIN falling |
|
2.2 |
2.5 |
V |
Vhys |
Undervoltage lockout hysterisis |
|
|
70 |
|
mV |
ENABLE AND REFERENCE CONTROL |
V(CTRLh) |
CTRL logic high voltage |
VIN = 2.7 V to 18 V |
1.2 |
|
|
V |
V(CTRLl) |
CTRL logic low voltage |
VIN = 2.7 V to 18 V |
|
|
0.4 |
V |
R(CTRL) |
CTRL pull down resistor |
|
400 |
800 |
1600 |
kΩ |
VOLTAGE AND CURRENT CONTROL |
VREF |
Voltage feedback regulation voltage |
|
196 |
200 |
204 |
mV |
V(REF_PWM) |
Voltage feedback regulation voltage under brightness control |
VFB = 50 mV |
47 |
50 |
53 |
mV |
VFB = 20 mV |
17 |
20 |
23 |
IFB |
Voltage feedback input bias current |
VFB = 200 mV |
|
|
2 |
μA |
ƒS |
Oscillator frequency |
|
500 |
600 |
700 |
kHz |
Dmax |
Maximum duty cycle |
VFB = 100 mV, measured on the drive signal of the switching FET |
93% |
95% |
|
|
tmin_on |
Minimum on pulse width |
|
|
40 |
|
ns |
Isink |
Comp pin sink current |
|
|
100 |
|
μA |
Isource |
Comp pin source current |
|
|
100 |
|
μA |
Gea |
Error amplifier transconductance |
|
240 |
320 |
400 |
μmho |
Rea |
Error amplifier output resistance |
|
|
6 |
|
MΩ |
ƒea |
Error amplifier crossover frequency |
5 pF connected to COMP |
|
500 |
|
kHz |
POWER SWITCH |
RDS(on) |
N-channel MOSFET on-resistance |
VIN = 3.6 V |
|
0.3 |
0.6 |
Ω |
VIN = 3 V |
|
|
0.7 |
ILN_NFET |
N-channel leakage current |
VSW = 35 V, TA = 25°C |
|
|
1 |
μA |
OC and OLP |
ILIM |
N-Channel MOSFET current limit |
D = Dmax |
0.56 |
0.7 |
0.84 |
A |
ILIM_Start |
Start up current limit |
D = Dmax |
|
0.4 |
|
A |
tHalf_LIM |
Time step for half current limit |
|
|
5 |
|
ms |
Vovp |
Open LED protection threshold |
Measured on the SW pin, TPS61160 TPS61161 |
25 37 |
26 38 |
27 39 |
V |
V(FB_OVP) |
Open LED protection threshold on FB |
Measured on the FB pin, percentage of VREF
VREF= 200 mV and 20 mV |
|
50% |
|
|
VACKNL |
Acknowledge output voltage low |
Open drain, Rpullup =15 kΩ to VIN |
|
|
0.4 |
V |
THERMAL SHUTDOWN |
Tshutdown |
Thermal shutdown threshold |
|
|
160 |
|
°C |
Thysteresis |
Thermal shutdown threshold hysteresis |
|
|
15 |
|
°C |