LTC3300-1 Datasheet, PDF (5/44 Pages) Linear Technology – High Effciency Bidirectional Multicell Battery Balancer

LTC3300-1
E LECTRICAL CHAR ACTERISTICS The l denotes the specifications which apply over the full operating
Cju3nc=ti1o0n.8teV,mCp2er=a7tu.r2eV,raCn1g=e,3o.6thV,erVw^{–i=se0sV,peucnilfeicsastoiothnesrawrieseatnToA}te=d.25°C. ^{(Note 2) BOOST+ = 25.2V, C6 = 21.6V, C5 = 18V, C4 = 14.4V,}
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP MAX UNITS
t_{r_S}
Secondary Winding Gate Drive G1S, C_GATE = 2500pF
Rise Time (10% to 90%)
G2S Through G6S, CTRL = 0 Only, C_GATE = 2500pF
30
60
ns
30
60
ns
t_{f_S}
Secondary Winding Gate Drive Fall G1S, C_GATE = 2500pF
Time (90% to 10%)
G2S Through G6S, CTRL = 0 Only, C_GATE = 2500pF
20
40
ns
20
40
ns
t_ONP|MAX
Primary Winding Switch Maximum R_RTONP = 20kΩ (Measured at G1P-G6P)
On-Time
l
6
7.2
8.4
µs
t_ONS|MAX
t_ONP|MAX Matching (All 6)
Secondary Winding Switch
Maximum On-Time
±[(Max – Min)/(Max + Min)] • 100%
R_RTONS = 15kΩ (Measured at G1S-G6S)
l
±1
±4
%
l
1
1.2
1.4
µs
t_ONS|MAX Matching (All 6)
±[(Max – Min)/(Max + Min)] • 100%
l
t_{DLY_START}
Delayed Start Time After New/
Different Balance Command or
Recovery from Voltage/Temp Fault
±1
±4
%
2
ms
Voltage Mode Timing Specifications
t₁
SDI Valid to SCKI Rising Setup Write Operation
l
10
ns
t₂
SDI Valid from SCKI Rising Hold Write Operation
l 250
ns
t₃
SCKI Low
l 400
ns
t₄
SCKI High
l 400
ns
t₅
CSBI Pulse Width
l 400
ns
t₆
SCKI Rising to CSBI Rising
l 100
ns
t₇
CSBI Falling to SCKI Rising
l 100
ns
t₈
SCKI Falling to SDO Valid
Read Operation
l
250
ns
f_CLK
Clock Frequency
l
1
MHz
t_WD1
Watchdog Timer Timeout Period WDT Assertion Measured from Last Valid
l 0.75
1.5
2.25 second
Command Byte
t_WD2
Watchdog Timer Reset Time
WDT Negation Measured from Last Valid
l
Command Byte
1.5
5
µs
Current Mode Timing Specifications
t_PD1
CSBI to CSBO Delay
C_CSBO = 150pF
l
t_PD2
SCKI Rising to SCKO Delay
C_SCKO = 150pF
l
t_PD3
SDI to SDOI Delay
C_SDOI = 150pF, Command Byte
l
t_PD4
SCKI Falling to SDOI Valid
C_SDOI = 150pF, Write Balance Command
l
t_PD5
SCKI Falling to SDI Valid
C_SDI = 150pF, Read Operation
l
t_SCKO
SCKO Pulse Width
C_SCKO = 150pF
Voltage Mode Digital I/O Specifications
600
ns
300
ns
300
ns
300
ns
300
ns
100
ns
V_IH
Digital Input Voltage High
Pins CSBI, SCKI, SDI; V_MODE = V_REG
l V_REG – 0.5
V
Pins CTRL, BOOST, V_MODE, TOS
l V_REG – 0.5
V
Pin WDT
l
2
V
V_IL
Digital Input Voltage Low
Pins CSBI, SCKI, SDI; V_MODE = V_REG
l
Pins CTRL, BOOST, V_MODE, TOS
l
Pin WDT
l
0.5
V
0.5
V
0.8
V
I_IH
Digital Input Current High
Pins CSBI, SCKI, SDI; V_MODE = V_REG
Pins CTRL, BOOST, V_MODE, TOS
Pin WDT, Timed Out
–1
0
1
µA
–1
0
1
µA
–1
0
1
µA
I_IL
Digital Input Current Low
Pins CSBI, SCKI, SDI; V_MODE = V_REG
Pins CTRL, BOOST, V_MODE, TOS
Pin WDT, Not Balancing
–1
0
1
µA
–1
0
1
µA
–1
0
1
µA
For more information www.linear.com/product/LTC3300-1
33001f
5