LTC1922-1_15 Datasheet, PDF (2/24 Pages) Linear Technology – Synchronous Phase Modulated Full-Bridge Controller

LTC1922-1
ABSOLUTE AXI U RATI GS
(Note 1)
V_CC to GND
Low Impedance Source ......................... –0.3V to 10V
(Chip Self Regulates at 10.3V)
All Other Pins to GND
(Low Impedance Source) ..................... –0.3V to 5.5V
V_CC (Current Fed) .................................................. 25mA
V_REF Output Current ................................ Self Regulated
Outputs (A, B, C, D, E, F) Current ..................... ±100mA
Operating Temperature Range (Note 5)
LTC1922E ........................................... – 40°C to 85°C
LTC1922I ............................................ – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
SYNC 1
RAMP 2
CS 3
COMP 4
R_LEB 5
FB 6
SS 7
PDLY 8
SBUS 9
ADLY 10
20 C_T
19 GND
18 OUTA
17 OUTB
16 OUTC
15 V_CC
14 OUTD
13 OUTE
12 OUTF
11 V_REF
ORDER PART
NUMBER
LTC1922EG-1
LTC1922IG-1
LTC1922EN-1
LTC1922IN-1
G PACKAGE
N PACKAGE
20-LEAD PLASTIC SSOP 20-LEAD PDIP
T_JMAX = 125°C, θ_JA = 110°C/W (G)
T_JMAX = 125°C,θ_JA = 62°C/W (N)
Consult factory for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at V_CC = 9.5V, C_T = 180pF, T_A = T_MIN to T_MAX unless other wise noted.
SYMBOL
Input Supply
UVLO
UVHY
I_CCST
I_CCRN
V_SHUNT
R_SHUNT
Delay Blocks
DTHR
DHYS
DTMO
PARAMETER
Undervoltage Lockout
UVLO Hysteresis
Start-Up Current
Operating Current
Shunt Regulator Voltage
Shunt Resistance
Delay Pin Threshold
ADLY and PDLY
Delay Hysteresis Current
ADLY and PDLY
Delay Time-Out
DZRT
Phase Modulator
ROS
I_RMP
I_SLP
Zero Delay Threshold
RAMP Offset Voltage
RAMP Discharge Current
Slope Compensation Current
DCMX
DCMN
Maximum Phase Shift
Minimum Phase Shift
CONDITIONS
Measured on V_CC
Measured on V_CC
V_CC = V_UVLO – 0.3V
Current Into V_CC = 10mA
Current Into V_CC = 7mA to 17mA
SBUS = 1.5V
SBUS = 2.25V
SBUS = 1.5V, ADLY/PDLY = 1.6V
SBUS = 1.5V
SBUS = 2.25V
Measured on SBUS
Measured on COMP, RAMP = 0V
RAMP = 1V, COMP = 0V
Measured on CS, C_T = 1.5V
C_T = 3V
COMP = 4V
COMP = 0V
MIN TYP MAX UNITS
10.25 10.7
V
3.8
4.2
V
q
145 250
µA
4
7
mA
10.2 10.8
V
–1.5
2
Ω
1.38 1.50 1.62
V
2.08 2.25 2.42
V
1.1
1.3 1.45
mA
600
ns
900
ns
3
4.15
5
V
0.4
V
30
50
mA
35
55
75
µA
70
110 150
µA
q 95
99.5
%
q
0.1
0.6
%
2