Datasheet

LTC3300-2
4
33002f
For more information www.linear.com/LTC3300-2
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C. (Note 2) BOOST
+
= 25.2V, C6 = 21.6V, C5 = 18V, C4 = 14.4V,
C3 = 10.8V, C2 = 7.2V, C1 = 3.6V, V
–
= 0V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
REG_SC
Regulator Pin Short Circuit Current
Limit
V
REG
= 0V 55 mA
V
RTONP
RTONP Servo Voltage R
RTONP
= 20kΩ
l
1.158 1.2 1.242 V
V
RTONS
RTONS Servo Voltage R
RTONS
= 15kΩ
l
1.158 1.2 1.242 V
I
WDT_RISING
WDT Pin Current, Balancing R
TONS
= 15kΩ, WDT = 0.5V
l
72 80 88 µA
I
WDT_FALLING
WDT Pin Current as a Percentage
of I
WDT_RISING
, Secondary OV
R
TONS
= 15kΩ, WDT = 2V
l
85 87.5 90 %
V
PEAK_P
Primary Winding Peak Current
Sense Voltage
I1P
InP to Cn – 1, n = 2 to 6
l
l
45
45
50
50
55
55
mV
mV
V
PEAK_P
Matching (All 6) ±[(Max – Min)/(Max + Min)] • 100%
l
±1.7 ±5 %
V
PEAK_S
Secondary Winding Peak Current
Sense Voltage
I1S
InS to Cn – 1, n = 2 to 6, CTRL = 0 Only
l
l
45
45
50
50
55
55
mV
mV
V
PEAK_S
Matching (All 6) ±[(Max – Min)/(Max + Min)] • 100%
l
±0.5 ±3 %
V
ZERO_P
Primary Winding Zero Current
Sense Voltage (Note 5)
I1P
InP to Cn – 1, n = 2 to 6
l
l
–7
–7
–2
–2
3
3
mV
mV
V
ZERO_P
Matching (All 6)
Normalized to Mid-Range V
PEAK_P
±{[(Max – Min)/2]/(V
PEAK_P|MIDRANGE
)} • 100%
(Note 6)
l
±1.7 ±5 %
V
ZERO_S
Secondary Winding Zero Current
Sense Voltage (Note 5)
I1S
InS to Cn – 1, n = 2 to 6, CTRL = 0 Only
l
l
–12
–12
–7
–7
–2
–2
mV
mV
V
ZERO_S
Matching (All 6)
Normalized to Mid-Range V
PEAK_S
±{[(Max – Min)/2]/(V
PEAK_S|MIDRANGE
)} • 100%
(Note 6)
l
±0.5 ±3 %
R
BOOST_L
BOOST
–
Pin Pull-Down R
ON
Measured at 100mA Into Pin, BOOST = V
REG
2.5 Ω
R
BOOST_H
BOOST
–
Pin Pull-Up R
ON
Measured at 100mA Out of Pin, BOOST = V
REG
4 Ω
T
SD
Thermal Shutdown Threshold
(Note 7)
Rising Temperature 155 °C
T
HYS
Thermal Shutdown Hysteresis 10 °C
Timing Specifications
t
r_P
Primary Winding Gate Drive Rise
Time (10% to 90%)
G1P Through G6P, C
GATE
= 2500pF 35 70 ns
t
f_P
Primary Winding Gate Drive Fall
Time (90% to 10%)
G1P Through G6P, C
GATE
= 2500pF 20 40 ns
t
r_S
Secondary Winding Gate Drive
Rise Time (10% to 90%)
G1S, C
GATE
= 2500pF
G2S Through G6S, CTRL = 0 Only, C
GATE
= 2500pF
30
30
60
60
ns
ns
t
f_S
Secondary Winding Gate Drive Fall
Time (90% to 10%)
G1S, C
GATE
= 2500pF
G2S Through G6S, CTRL = 0 Only, C
GATE
= 2500pF
20
20
40
40
ns
ns
t
ONP|MAX
Primary Winding Switch Maximum
On-Time
R
RTONP
= 20kΩ (Measured at G1P-G6P)
l
6 7.2 8.4 µs
t
ONP|MAX
Matching (All 6) ±[(Max – Min)/(Max + Min)] • 100%
l
±1 ±4 %
t
ONS|MAX
Secondary Winding Switch
Maximum On-Time
R
RTONS
= 15kΩ (Measured at G1S-G6S)
l
1 1.2 1.4 µs
t
ONS|MAX
Matching (All 6) ±[(Max – Min)/(Max + Min)] • 100%
l
±1 ±4 %
t
D LY _START
Delayed Start Time After New/
Different Balance Command or
Recovery from Voltage/Temp Fault
2 ms
SPI Port Timing Specifications
t
1
SDI Valid to SCKI Rising Setup Write Operation
l
10 ns
t
2
SDI Valid from SCKI Rising Hold Write Operation
l
250 ns
t
3
SCKI Low
l
400 ns
t
4
SCKI High
l
400 ns