MAX8520 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX8520 Datasheet PDF : 18 Pages
| |||
Smallest TEC Power Drivers for Optical
Modules
ELECTRICAL CHARACTERISTICS (continued)
(VDD = VPVDD1 = VPVDD2 = VSHDN = 5V, 1MHz mode (Note2). PGND1 = PGND2 = GND, CTLI = MAXV = MAXIP = MAXIN = REF,
TA = -40°C to +85°C, unless otherwise noted.) (Note 7)
PARAMETER
MAXV Threshold Accuracy
SYMBOL
CONDITIONS
MIN
VMAXV = VREF x 0.67, VOS1 to VOS2 = ±4V,
-2
VDD = 5V
VMAXV = VREF x 0.33, VOS1 to VOS2 = ±2V,
-3
VDD = 3V
MAX UNITS
+2
%
+3
%
MAXV, MAXI_ Input Bias Current
CTLI Gain
CTLI Input Resistance
Error-Amp Transconductance
VITEC Accuracy
IMAXV-
BIAS, VMAXV = VMAXI_ = 0.1V or 1.5V
IMAXI_-BIAS
ACTLI
RCTLI
gm
VCTLI = 0.5V to 2.5V (Note 6)
1MΩ terminated at REF
VOS1 to VCS = ±100mV
VOS1 = VDD /2
-0.1
+0.1
µA
9.5
10.5
V/V
0.5
2.0
MΩ
50
160
µS
-10
+10
%
Note 3: Enter 1MHz mode by connecting a 60kΩ resistor from FREQ to ground for the MAX8520, and connecting FREQ to VDD for
the MAX8521.
Note 4: Includes power FET leakage.
Note 5: Duty-cycle specification is guaranteed by design and not production tested.
Note 6: CTLI Gain is defined as:
( ) ACTLI
=
∆
∆VCTLI
VOS1 − VCS
Note 7: Specifications to -40°C are guaranteed by design and not production tested.
Typical Operating Characteristics
(VDD = 5V, circuit of Figure 1, TA = +25°C unless otherwise noted)
90
80
70
60
50
40
30
20
10
0
0
EFFICIENCY vs. TEC CURRENT
VDD = 5V, RTEC = 2Ω
FREQ = 500kHz
FREQ = 1MHz
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
TEC CURENT (A)
EFFICIENCY vs. TEC CURRENT
VDD = 3.3V, RTEC = 1.3Ω
90
80
70
FREQ = 500kHz
60
FREQ = 1MHz
50
40
30
20
10
0
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
TEC CURRENT (A)
COMMON-MODE
OUTPUT VOLTAGE RIPPLE
MAX8520/21 toc03
C2 = C7 = 1µF
VOS2
20mV/div
AC-COUPLED
400ns/div
VOS1
20mV/div
AC-COUPLED
ITEC = 1A
_______________________________________________________________________________________ 5
Share Link: 